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The 7.7x is not a brute-force win — pino doesn't try to accumulate context, so the comparison reflects an architectural difference, not a fairness issue. See ",[459,679,681],{"href":680},"#when-evlog-might-not-win","When evlog might not win"," for the honest gaps.",[480,684,686],{"id":685},"what-is-the-wide-event-lifecycle","What is the \"wide event lifecycle\"?",[450,688,689],{},"This benchmark simulates a real API request:",[691,692,693,959],"code-group",{},[694,695,701],"pre",{"className":696,"code":697,"filename":698,"language":699,"meta":700,"style":700},"language-typescript shiki shiki-themes material-theme-lighter material-theme material-theme-palenight","const log = createLogger({ method: 'POST', path: '\u002Fapi\u002Fcheckout', requestId: 'req_abc' })\nlog.set({ user: { id: 'usr_123', plan: 'pro' } })\nlog.set({ cart: { items: 3, total: 9999 } })\nlog.set({ payment: { method: 'card', last4: '4242' } })\nlog.emit({ status: 200 })\n","evlog (1 event)","typescript","",[475,702,703,782,837,882,933],{"__ignoreMap":700},[704,705,708,712,716,720,724,727,730,734,737,740,744,747,750,753,755,757,760,762,764,767,769,771,774,776,779],"span",{"class":706,"line":707},"line",1,[704,709,711],{"class":710},"spNyl","const",[704,713,715],{"class":714},"sTEyZ"," log ",[704,717,719],{"class":718},"sMK4o","=",[704,721,723],{"class":722},"s2Zo4"," createLogger",[704,725,726],{"class":714},"(",[704,728,729],{"class":718},"{",[704,731,733],{"class":732},"swJcz"," method",[704,735,736],{"class":718},":",[704,738,739],{"class":718}," '",[704,741,743],{"class":742},"sfazB","POST",[704,745,746],{"class":718},"'",[704,748,749],{"class":718},",",[704,751,752],{"class":732}," path",[704,754,736],{"class":718},[704,756,739],{"class":718},[704,758,759],{"class":742},"\u002Fapi\u002Fcheckout",[704,761,746],{"class":718},[704,763,749],{"class":718},[704,765,766],{"class":732}," requestId",[704,768,736],{"class":718},[704,770,739],{"class":718},[704,772,773],{"class":742},"req_abc",[704,775,746],{"class":718},[704,777,778],{"class":718}," }",[704,780,781],{"class":714},")\n",[704,783,785,788,790,793,795,797,800,802,805,808,810,812,815,817,819,822,824,826,829,831,833,835],{"class":706,"line":784},2,[704,786,787],{"class":714},"log",[704,789,465],{"class":718},[704,791,792],{"class":722},"set",[704,794,726],{"class":714},[704,796,729],{"class":718},[704,798,799],{"class":732}," user",[704,801,736],{"class":718},[704,803,804],{"class":718}," {",[704,806,807],{"class":732}," id",[704,809,736],{"class":718},[704,811,739],{"class":718},[704,813,814],{"class":742},"usr_123",[704,816,746],{"class":718},[704,818,749],{"class":718},[704,820,821],{"class":732}," plan",[704,823,736],{"class":718},[704,825,739],{"class":718},[704,827,828],{"class":742},"pro",[704,830,746],{"class":718},[704,832,778],{"class":718},[704,834,778],{"class":718},[704,836,781],{"class":714},[704,838,840,842,844,846,848,850,853,855,857,860,862,866,868,871,873,876,878,880],{"class":706,"line":839},3,[704,841,787],{"class":714},[704,843,465],{"class":718},[704,845,792],{"class":722},[704,847,726],{"class":714},[704,849,729],{"class":718},[704,851,852],{"class":732}," cart",[704,854,736],{"class":718},[704,856,804],{"class":718},[704,858,859],{"class":732}," items",[704,861,736],{"class":718},[704,863,865],{"class":864},"sbssI"," 3",[704,867,749],{"class":718},[704,869,870],{"class":732}," total",[704,872,736],{"class":718},[704,874,875],{"class":864}," 9999",[704,877,778],{"class":718},[704,879,778],{"class":718},[704,881,781],{"class":714},[704,883,885,887,889,891,893,895,898,900,902,904,906,908,911,913,915,918,920,922,925,927,929,931],{"class":706,"line":884},4,[704,886,787],{"class":714},[704,888,465],{"class":718},[704,890,792],{"class":722},[704,892,726],{"class":714},[704,894,729],{"class":718},[704,896,897],{"class":732}," payment",[704,899,736],{"class":718},[704,901,804],{"class":718},[704,903,733],{"class":732},[704,905,736],{"class":718},[704,907,739],{"class":718},[704,909,910],{"class":742},"card",[704,912,746],{"class":718},[704,914,749],{"class":718},[704,916,917],{"class":732}," last4",[704,919,736],{"class":718},[704,921,739],{"class":718},[704,923,924],{"class":742},"4242",[704,926,746],{"class":718},[704,928,778],{"class":718},[704,930,778],{"class":718},[704,932,781],{"class":714},[704,934,936,938,940,943,945,947,950,952,955,957],{"class":706,"line":935},5,[704,937,787],{"class":714},[704,939,465],{"class":718},[704,941,942],{"class":722},"emit",[704,944,726],{"class":714},[704,946,729],{"class":718},[704,948,949],{"class":732}," status",[704,951,736],{"class":718},[704,953,954],{"class":864}," 200",[704,956,778],{"class":718},[704,958,781],{"class":714},[694,960,963],{"className":696,"code":961,"filename":962,"language":699,"meta":700,"style":700},"const child = pinoLogger.child({ method: 'POST', path: '\u002Fapi\u002Fcheckout', requestId: 'req_abc' })\nchild.info({ user: { id: 'usr_123', plan: 'pro' } }, 'user context')\nchild.info({ cart: { items: 3, total: 9999 } }, 'cart context')\nchild.info({ payment: { method: 'card', last4: '4242' } }, 'payment context')\nchild.info({ status: 200 }, 'request complete')\n","pino (4 log lines)",[475,964,965,1024,1078,1123,1176],{"__ignoreMap":700},[704,966,967,969,972,974,977,979,982,984,986,988,990,992,994,996,998,1000,1002,1004,1006,1008,1010,1012,1014,1016,1018,1020,1022],{"class":706,"line":707},[704,968,711],{"class":710},[704,970,971],{"class":714}," child ",[704,973,719],{"class":718},[704,975,976],{"class":714}," pinoLogger",[704,978,465],{"class":718},[704,980,981],{"class":722},"child",[704,983,726],{"class":714},[704,985,729],{"class":718},[704,987,733],{"class":732},[704,989,736],{"class":718},[704,991,739],{"class":718},[704,993,743],{"class":742},[704,995,746],{"class":718},[704,997,749],{"class":718},[704,999,752],{"class":732},[704,1001,736],{"class":718},[704,1003,739],{"class":718},[704,1005,759],{"class":742},[704,1007,746],{"class":718},[704,1009,749],{"class":718},[704,1011,766],{"class":732},[704,1013,736],{"class":718},[704,1015,739],{"class":718},[704,1017,773],{"class":742},[704,1019,746],{"class":718},[704,1021,778],{"class":718},[704,1023,781],{"class":714},[704,1025,1026,1028,1030,1032,1034,1036,1038,1040,1042,1044,1046,1048,1050,1052,1054,1056,1058,1060,1062,1064,1066,1069,1071,1074,1076],{"class":706,"line":784},[704,1027,981],{"class":714},[704,1029,465],{"class":718},[704,1031,673],{"class":722},[704,1033,726],{"class":714},[704,1035,729],{"class":718},[704,1037,799],{"class":732},[704,1039,736],{"class":718},[704,1041,804],{"class":718},[704,1043,807],{"class":732},[704,1045,736],{"class":718},[704,1047,739],{"class":718},[704,1049,814],{"class":742},[704,1051,746],{"class":718},[704,1053,749],{"class":718},[704,1055,821],{"class":732},[704,1057,736],{"class":718},[704,1059,739],{"class":718},[704,1061,828],{"class":742},[704,1063,746],{"class":718},[704,1065,778],{"class":718},[704,1067,1068],{"class":718}," },",[704,1070,739],{"class":718},[704,1072,1073],{"class":742},"user context",[704,1075,746],{"class":718},[704,1077,781],{"class":714},[704,1079,1080,1082,1084,1086,1088,1090,1092,1094,1096,1098,1100,1102,1104,1106,1108,1110,1112,1114,1116,1119,1121],{"class":706,"line":839},[704,1081,981],{"class":714},[704,1083,465],{"class":718},[704,1085,673],{"class":722},[704,1087,726],{"class":714},[704,1089,729],{"class":718},[704,1091,852],{"class":732},[704,1093,736],{"class":718},[704,1095,804],{"class":718},[704,1097,859],{"class":732},[704,1099,736],{"class":718},[704,1101,865],{"class":864},[704,1103,749],{"class":718},[704,1105,870],{"class":732},[704,1107,736],{"class":718},[704,1109,875],{"class":864},[704,1111,778],{"class":718},[704,1113,1068],{"class":718},[704,1115,739],{"class":718},[704,1117,1118],{"class":742},"cart context",[704,1120,746],{"class":718},[704,1122,781],{"class":714},[704,1124,1125,1127,1129,1131,1133,1135,1137,1139,1141,1143,1145,1147,1149,1151,1153,1155,1157,1159,1161,1163,1165,1167,1169,1172,1174],{"class":706,"line":884},[704,1126,981],{"class":714},[704,1128,465],{"class":718},[704,1130,673],{"class":722},[704,1132,726],{"class":714},[704,1134,729],{"class":718},[704,1136,897],{"class":732},[704,1138,736],{"class":718},[704,1140,804],{"class":718},[704,1142,733],{"class":732},[704,1144,736],{"class":718},[704,1146,739],{"class":718},[704,1148,910],{"class":742},[704,1150,746],{"class":718},[704,1152,749],{"class":718},[704,1154,917],{"class":732},[704,1156,736],{"class":718},[704,1158,739],{"class":718},[704,1160,924],{"class":742},[704,1162,746],{"class":718},[704,1164,778],{"class":718},[704,1166,1068],{"class":718},[704,1168,739],{"class":718},[704,1170,1171],{"class":742},"payment context",[704,1173,746],{"class":718},[704,1175,781],{"class":714},[704,1177,1178,1180,1182,1184,1186,1188,1190,1192,1194,1196,1198,1201,1203],{"class":706,"line":935},[704,1179,981],{"class":714},[704,1181,465],{"class":718},[704,1183,673],{"class":722},[704,1185,726],{"class":714},[704,1187,729],{"class":718},[704,1189,949],{"class":732},[704,1191,736],{"class":718},[704,1193,954],{"class":864},[704,1195,1068],{"class":718},[704,1197,739],{"class":718},[704,1199,1200],{"class":742},"request complete",[704,1202,746],{"class":718},[704,1204,781],{"class":714},[450,1206,1207],{},"Same CPU cost, but evlog gives you everything in one place.",[467,1209,1211],{"id":1210},"why-is-evlog-faster","Why is evlog faster?",[450,1213,1214],{},"The numbers above aren't magic, they come from deliberate architectural choices:",[450,1216,1217,1220,1221,1224,1225,1228,1229,1232],{},[454,1218,1219],{},"In-place mutations, not copies."," ",[475,1222,1223],{},"log.set()"," writes directly into the context object via a recursive ",[475,1226,1227],{},"mergeInto"," function. Other loggers clone objects on every call (object spread, ",[475,1230,1231],{},"Object.assign","). evlog never allocates intermediate objects during context accumulation.",[450,1234,1235,1238,1239,1242,1243,1246],{},[454,1236,1237],{},"No serialization until drain."," Context stays as plain JavaScript objects throughout the request lifecycle. ",[475,1240,1241],{},"JSON.stringify"," runs exactly once, at emit time. Traditional loggers serialize on every ",[475,1244,1245],{},".info()"," call, that's 4x serialization for 4 log lines.",[450,1248,1249,1252,1253,1256],{},[454,1250,1251],{},"Lazy allocation."," Timestamps, sampling context, and override objects are only created when actually needed. If tail sampling is disabled (the common case), its context object is never allocated. The ",[475,1254,1255],{},"Date"," instance used for ISO timestamps is reused across calls.",[450,1258,1259,1262],{},[454,1260,1261],{},"One event, not N lines."," For a typical request, pino emits 4+ JSON lines that all need serializing, transporting, and indexing. evlog emits one. That's 75% less work for your log drain, fewer bytes on the wire, and one row to query instead of four.",[450,1264,1265,1268],{},[454,1266,1267],{},"RegExp caching."," Glob patterns (used in sampling and route matching) are compiled once and cached. Repeated evaluations hit the cache instead of recompiling.",[467,1270,681],{"id":1271},"when-evlog-might-not-win",[450,1273,1274],{},"The benchmarks above measure CPU + serialization cost on the main thread, with no real I\u002FO. That's the standard setup pino, winston, and logtape use for their own benchmarks — but it leaves out a few scenarios where another logger can edge ahead. Be honest about these:",[450,1276,1277,1280,1281,1286,1287,1290,1291,1294,1295,1298],{},[454,1278,1279],{},"Fire-and-forget hot paths with pino-via-worker-thread."," In production, pino is typically configured with a ",[459,1282,1285],{"href":1283,"rel":1284},"https:\u002F\u002Fgetpino.io\u002F#\u002Fdocs\u002Ftransports",[463],"worker-thread transport"," (",[475,1288,1289],{},"pino-pretty",", ",[475,1292,1293],{},"pino-loki",", vendor-specific transports). The serialization and I\u002FO move off the main thread entirely. For a workload that emits hundreds of thousands of ",[475,1296,1297],{},"log.info('foo')"," lines per second with no context accumulation, pino-via-worker can hit ~2-3M ops\u002Fs on the main thread because it's just queueing. We can't benchmark that mode fairly inside a single-threaded vitest process, so it's not in our table — but it's a real scenario where pino is faster.",[450,1300,1301,1304,1305,1308],{},[454,1302,1303],{},"CLI \u002F pretty-only output without serialization."," consola's no-op reporter mode in our benchmarks (",[475,1306,1307],{},"level: 4, reporters: [{ log: () => {} }]",") skips JSON serialization entirely. That's realistic if you're using consola for a CLI with terminal-only output, but it's why consola wins \"simple string\" and \"burst\" — it's not doing the same work. evlog and pino both serialize to JSON; consola in those benchmarks does not. If your use case is \"pretty terminal output, no shipping logs anywhere\", consola is genuinely lighter.",[450,1310,1311,1318,1319,1322,1323,1326,1327,1330],{},[454,1312,1313,1314,1317],{},"Single ",[475,1315,1316],{},"log.info"," calls, no context accumulation."," evlog and pino are roughly tied on ",[475,1320,1321],{},"pino.info('hello')"," vs ",[475,1324,1325],{},"evlog.info('hello')"," (1.83M vs 1.09M ops\u002Fs in our run, but the gap closes further if pino runs in async mode). evlog's ~7.7x advantage shows up specifically when you'd otherwise emit N separate lines for one logical operation. If you genuinely log one line per call and don't accumulate, the speed delta is much smaller — pick evlog for the API ergonomics (",[475,1328,1329],{},"log.set"," + structured errors), not raw throughput.",[450,1332,1333,1336,1337,1340],{},[454,1334,1335],{},"Wall-clock variance is real."," Vitest bench numbers shift ±5-10% between runs on the same machine (thermal throttling, GC, other processes). The numbers above come from a single run on a MacBook; CI tracks regressions via ",[459,1338,464],{"href":461,"rel":1339},[463],"'s CPU-instruction counting (deterministic, ±0.5% noise floor) but the absolute hz values in this page are the wall-clock snapshot, not a guaranteed floor.",[450,1342,1343,1344,1347],{},"The takeaway: ",[454,1345,1346],{},"the wins are real for the wide event pattern",", but if your stack is \"pure fire-and-forget pino with a worker transport\", that's the one place we don't claim to beat.",[467,1349,1351],{"id":1350},"real-world-overhead","Real-world overhead",[450,1353,1354],{},"For a typical API request:",[488,1356,1357,1367],{},[491,1358,1359],{},[494,1360,1361,1364],{},[497,1362,1363],{},"Component",[497,1365,1366],{"align":502},"Cost",[514,1368,1369,1376,1388,1398,1405,1413],{},[494,1370,1371,1373],{},[519,1372,636],{},[519,1374,1375],{"align":502},"52ns",[494,1377,1378,1385],{},[519,1379,1380,1381,1384],{},"3x ",[475,1382,1383],{},"set()"," calls",[519,1386,1387],{"align":502},"105ns",[494,1389,1390,1395],{},[519,1391,1392],{},[475,1393,1394],{},"emit()",[519,1396,1397],{"align":502},"588ns",[494,1399,1400,1402],{},[519,1401,61],{},[519,1403,1404],{"align":502},"22ns",[494,1406,1407,1410],{},[519,1408,1409],{},"Enricher pipeline",[519,1411,1412],{"align":502},"2.14µs",[494,1414,1415,1420],{},[519,1416,1417],{},[454,1418,1419],{},"Total",[519,1421,1422],{"align":502},[454,1423,1424],{},"~2.9µs",[450,1426,1427,1428,465],{},"For context, a database query takes 1-50ms, an HTTP call takes 10-500ms. evlog's overhead is ",[454,1429,1430],{},"invisible",[467,1432,1434],{"id":1433},"bundle-size","Bundle size",[450,1436,1437],{},"Every entry point is tree-shakeable. You only pay for what you import.",[488,1439,1440,1450],{},[491,1441,1442],{},[494,1443,1444,1447],{},[497,1445,1446],{},"Entry",[497,1448,1449],{"align":502},"Gzip",[514,1451,1452,1463,1474,1482,1490,1498,1506,1514,1522,1530],{},[494,1453,1454,1460],{},[519,1455,1456,1457,1459],{},"core (",[475,1458,503],{},")",[519,1461,1462],{"align":502},"510 B",[494,1464,1465,1471],{},[519,1466,1467,1468,1459],{},"toolkit (",[475,1469,1470],{},"evlog\u002Ftoolkit",[519,1472,1473],{"align":502},"720 B",[494,1475,1476,1479],{},[519,1477,1478],{},"utils",[519,1480,1481],{"align":502},"1.58 kB",[494,1483,1484,1487],{},[519,1485,1486],{},"error",[519,1488,1489],{"align":502},"1.46 kB",[494,1491,1492,1495],{},[519,1493,1494],{},"enrichers",[519,1496,1497],{"align":502},"1.99 kB",[494,1499,1500,1503],{},[519,1501,1502],{},"pipeline",[519,1504,1505],{"align":502},"1.35 kB",[494,1507,1508,1511],{},[519,1509,1510],{},"http",[519,1512,1513],{"align":502},"1.22 kB",[494,1515,1516,1519],{},[519,1517,1518],{},"browser",[519,1520,1521],{"align":502},"289 B",[494,1523,1524,1527],{},[519,1525,1526],{},"workers",[519,1528,1529],{"align":502},"1.30 kB",[494,1531,1532,1535],{},[519,1533,1534],{},"client",[519,1536,1537],{"align":502},"128 B",[450,1539,1540,1541,1544,1545,1548,1549,1552,1553,1290,1556,1290,1559,1562,1563,1566,1567,1570,1571,1574],{},"A typical Node.js bundle (",[475,1542,1543],{},"initLogger"," + ",[475,1546,1547],{},"createLogger",") measures ",[454,1550,1551],{},"~6.3 kB gzip"," end-to-end after tree-shaking; adding ",[475,1554,1555],{},"createRequestLogger",[475,1557,1558],{},"createError",[475,1560,1561],{},"parseError",", and ",[475,1564,1565],{},"useLogger"," brings the bundle to ",[454,1568,1569],{},"~7.2 kB gzip",". Adapters and framework integrations sit on top: Hono is 617 B, Express 734 B, Axiom 1.48 kB. Bundle size is tracked on every PR and compared against the ",[475,1572,1573],{},"main"," baseline.",[467,1576,1578],{"id":1577},"detailed-benchmarks","Detailed benchmarks",[480,1580,636],{"id":1581},"logger-creation",[488,1583,1584,1597],{},[491,1585,1586],{},[494,1587,1588,1591,1594],{},[497,1589,1590],{},"Operation",[497,1592,1593],{"align":502},"ops\u002Fsec",[497,1595,1596],{"align":502},"Mean",[514,1598,1599,1612,1625,1638,1652],{},[494,1600,1601,1607,1610],{},[519,1602,1603,1606],{},[475,1604,1605],{},"createLogger()"," (no context)",[519,1608,1609],{"align":502},"19.20M",[519,1611,1375],{"align":502},[494,1613,1614,1619,1622],{},[519,1615,1616,1618],{},[475,1617,1605],{}," (shallow context)",[519,1620,1621],{"align":502},"18.74M",[519,1623,1624],{"align":502},"53ns",[494,1626,1627,1632,1635],{},[519,1628,1629,1631],{},[475,1630,1605],{}," (nested context)",[519,1633,1634],{"align":502},"17.70M",[519,1636,1637],{"align":502},"56ns",[494,1639,1640,1646,1649],{},[519,1641,1642,1645],{},[475,1643,1644],{},"createRequestLogger()"," (method + path)",[519,1647,1648],{"align":502},"16.91M",[519,1650,1651],{"align":502},"59ns",[494,1653,1654,1659,1662],{},[519,1655,1656,1658],{},[475,1657,1644],{}," (method + path + requestId)",[519,1660,1661],{"align":502},"12.67M",[519,1663,1664],{"align":502},"79ns",[480,1666,1668,1669,1459],{"id":1667},"context-accumulation-logset","Context accumulation (",[475,1670,1223],{},[488,1672,1673,1683],{},[491,1674,1675],{},[494,1676,1677,1679,1681],{},[497,1678,1590],{},[497,1680,1593],{"align":502},[497,1682,1596],{"align":502},[514,1684,1685,1695,1706,1717],{},[494,1686,1687,1690,1693],{},[519,1688,1689],{},"Shallow merge (3 fields)",[519,1691,1692],{"align":502},"9.56M",[519,1694,1387],{"align":502},[494,1696,1697,1700,1703],{},[519,1698,1699],{},"Shallow merge (10 fields)",[519,1701,1702],{"align":502},"4.79M",[519,1704,1705],{"align":502},"209ns",[494,1707,1708,1711,1714],{},[519,1709,1710],{},"Deep nested merge",[519,1712,1713],{"align":502},"8.04M",[519,1715,1716],{"align":502},"124ns",[494,1718,1719,1722,1725],{},[519,1720,1721],{},"4 sequential calls",[519,1723,1724],{"align":502},"7.05M",[519,1726,1727],{"align":502},"142ns",[480,1729,1731,1732,1459],{"id":1730},"event-emission-logemit","Event emission (",[475,1733,1734],{},"log.emit()",[488,1736,1737,1747],{},[491,1738,1739],{},[494,1740,1741,1743,1745],{},[497,1742,1590],{},[497,1744,1593],{"align":502},[497,1746,1596],{"align":502},[514,1748,1749,1760,1769,1780],{},[494,1750,1751,1754,1757],{},[519,1752,1753],{},"Emit minimal event",[519,1755,1756],{"align":502},"1.93M",[519,1758,1759],{"align":502},"519ns",[494,1761,1762,1765,1767],{},[519,1763,1764],{},"Emit with context",[519,1766,584],{"align":502},[519,1768,1397],{"align":502},[494,1770,1771,1774,1777],{},[519,1772,1773],{},"Full lifecycle (create + 3 sets + emit)",[519,1775,1776],{"align":502},"1.59M",[519,1778,1779],{"align":502},"628ns",[494,1781,1782,1785,1788],{},[519,1783,1784],{},"Emit with error",[519,1786,1787],{"align":502},"65.9K",[519,1789,1790],{"align":502},"15.17µs",[671,1792,1795,1798,1799,1802],{"color":1793,"icon":1794},"amber","i-lucide-triangle-alert",[475,1796,1797],{},"emit with error"," is slower because ",[475,1800,1801],{},"Error.captureStackTrace()"," is an expensive V8 operation (~15µs). This only triggers when errors are thrown.",[480,1804,1806],{"id":1805},"payload-scaling","Payload scaling",[488,1808,1809,1820],{},[491,1810,1811],{},[494,1812,1813,1816,1818],{},[497,1814,1815],{},"Payload",[497,1817,1593],{"align":502},[497,1819,1596],{"align":502},[514,1821,1822,1833,1844],{},[494,1823,1824,1827,1830],{},[519,1825,1826],{},"Small (2 fields)",[519,1828,1829],{"align":502},"1.72M",[519,1831,1832],{"align":502},"581ns",[494,1834,1835,1838,1841],{},[519,1836,1837],{},"Medium (50 fields)",[519,1839,1840],{"align":502},"569.8K",[519,1842,1843],{"align":502},"1.76µs",[494,1845,1846,1849,1852],{},[519,1847,1848],{},"Large (200 nested fields)",[519,1850,1851],{"align":502},"131.2K",[519,1853,1854],{"align":502},"7.62µs",[480,1856,61],{"id":1857},"sampling",[488,1859,1860,1870],{},[491,1861,1862],{},[494,1863,1864,1866,1868],{},[497,1865,1590],{},[497,1867,1593],{"align":502},[497,1869,1596],{"align":502},[514,1871,1872,1882],{},[494,1873,1874,1877,1880],{},[519,1875,1876],{},"Tail sampling (shouldKeep)",[519,1878,1879],{"align":502},"44.97M",[519,1881,1404],{"align":502},[494,1883,1884,1887,1890],{},[519,1885,1886],{},"Full emit with head + tail",[519,1888,1889],{"align":502},"7.01M",[519,1891,1892],{"align":502},"143ns",[480,1894,349],{"id":1494},[488,1896,1897,1908],{},[491,1898,1899],{},[494,1900,1901,1904,1906],{},[497,1902,1903],{},"Enricher",[497,1905,1593],{"align":502},[497,1907,1596],{"align":502},[514,1909,1910,1921,1932,1943,1954],{},[494,1911,1912,1915,1918],{},[519,1913,1914],{},"User Agent (Chrome)",[519,1916,1917],{"align":502},"2.61M",[519,1919,1920],{"align":502},"384ns",[494,1922,1923,1926,1929],{},[519,1924,1925],{},"Geo (Vercel)",[519,1927,1928],{"align":502},"3.88M",[519,1930,1931],{"align":502},"258ns",[494,1933,1934,1937,1940],{},[519,1935,1936],{},"Request Size",[519,1938,1939],{"align":502},"12.37M",[519,1941,1942],{"align":502},"81ns",[494,1944,1945,1948,1951],{},[519,1946,1947],{},"Trace Context",[519,1949,1950],{"align":502},"4.35M",[519,1952,1953],{"align":502},"230ns",[494,1955,1956,1961,1966],{},[519,1957,1958],{},[454,1959,1960],{},"All combined (all headers)",[519,1962,1963],{"align":502},[454,1964,1965],{},"466.7K",[519,1967,1968],{"align":502},[454,1969,1412],{},[480,1971,1973],{"id":1972},"error-handling","Error handling",[488,1975,1976,1986],{},[491,1977,1978],{},[494,1979,1980,1982,1984],{},[497,1981,1590],{},[497,1983,1593],{"align":502},[497,1985,1596],{"align":502},[514,1987,1988,2001,2013],{},[494,1989,1990,1995,1998],{},[519,1991,1992],{},[475,1993,1994],{},"createError()",[519,1996,1997],{"align":502},"232.2K",[519,1999,2000],{"align":502},"4.31µs",[494,2002,2003,2008,2011],{},[519,2004,2005],{},[475,2006,2007],{},"parseError()",[519,2009,2010],{"align":502},"45.48M",[519,2012,1404],{"align":502},[494,2014,2015,2018,2021],{},[519,2016,2017],{},"Round-trip (create + parse)",[519,2019,2020],{"align":502},"231.4K",[519,2022,2023],{"align":502},"4.32µs",[480,2025,2027],{"id":2026},"middleware-pipeline","Middleware pipeline",[488,2029,2030,2040],{},[491,2031,2032],{},[494,2033,2034,2036,2038],{},[497,2035,1590],{},[497,2037,1593],{"align":502},[497,2039,1596],{"align":502},[514,2041,2042,2056,2069,2083,2096,2107],{},[494,2043,2044,2050,2053],{},[519,2045,2046,2049],{},[475,2047,2048],{},"resolveMiddlewarePluginRunner"," (no plugins)",[519,2051,2052],{"align":502},"37.70M",[519,2054,2055],{"align":502},"27ns",[494,2057,2058,2063,2066],{},[519,2059,2060,2062],{},[475,2061,2048],{}," (2 plugins, cached)",[519,2064,2065],{"align":502},"32.26M",[519,2067,2068],{"align":502},"31ns",[494,2070,2071,2077,2080],{},[519,2072,2073,2076],{},[475,2074,2075],{},"createMiddlewareLogger"," (no plugins, safe headers)",[519,2078,2079],{"align":502},"4.41M",[519,2081,2082],{"align":502},"227ns",[494,2084,2085,2090,2093],{},[519,2086,2087,2089],{},[475,2088,2075],{}," (2 plugins, cached merge)",[519,2091,2092],{"align":502},"4.13M",[519,2094,2095],{"align":502},"242ns",[494,2097,2098,2101,2104],{},[519,2099,2100],{},"Full request lifecycle (no plugins, no drain)",[519,2102,2103],{"align":502},"993.7K",[519,2105,2106],{"align":502},"1.01µs",[494,2108,2109,2112,2115],{},[519,2110,2111],{},"Full request lifecycle (2 plugins, sync drain)",[519,2113,2114],{"align":502},"621.2K",[519,2116,2117],{"align":502},"1.61µs",[467,2119,2121],{"id":2120},"methodology-trust","Methodology & trust",[480,2123,2125],{"id":2124},"can-you-trust-these-numbers","Can you trust these numbers?",[450,2127,2128,2129,2132,2133,2136,2137,2144],{},"Every benchmark in this page is ",[454,2130,2131],{},"open source"," and ",[454,2134,2135],{},"reproducible",". The benchmark files live in ",[459,2138,2141],{"href":2139,"rel":2140},"https:\u002F\u002Fgithub.com\u002Fhugorcd\u002Fevlog\u002Ftree\u002Fmain\u002Fpackages\u002Fevlog\u002Fbench",[463],[475,2142,2143],{},"packages\u002Fevlog\u002Fbench\u002F",". You can read the exact code, run it on your machine, and verify the results.",[450,2146,2147],{},"All libraries are tested under the same conditions:",[2149,2150,2151,2158,2164,2181],"ul",{},[2152,2153,2154,2157],"li",{},[454,2155,2156],{},"Same output mode",": JSON to a no-op destination (no disk or network I\u002FO measured)",[2152,2159,2160,2163],{},[454,2161,2162],{},"Same warmup",": each benchmark runs for 500ms after JIT stabilization",[2152,2165,2166,2169,2170,2175,2176],{},[454,2167,2168],{},"Same tooling",": ",[459,2171,2174],{"href":2172,"rel":2173},"https:\u002F\u002Fvitest.dev\u002Fguide\u002Ffeatures#benchmarking",[463],"Vitest bench"," powered by ",[459,2177,2180],{"href":2178,"rel":2179},"https:\u002F\u002Fgithub.com\u002Ftinylibs\u002Ftinybench",[463],"tinybench",[2152,2182,2183,2186],{},[454,2184,2185],{},"Same machine",": when comparing libraries, all benchmarks run in the same process on the same hardware",[480,2188,2190],{"id":2189},"ci-regression-tracking","CI regression tracking",[450,2192,2193],{},"Performance regressions are tracked on every pull request via two systems:",[2149,2195,2196,2204],{},[2152,2197,2198,2203],{},[454,2199,2200],{},[459,2201,464],{"href":461,"rel":2202},[463]," runs all benchmarks using CPU instruction counting (not wall-clock timing). This eliminates noise from shared CI runners and produces deterministic, reproducible results. Regressions are flagged directly on the PR.",[2152,2205,2206,2209,2210,2212],{},[454,2207,2208],{},"Bundle size comparison"," measures all entry points against the ",[475,2211,1573],{}," baseline and posts a size delta report as a PR comment.",[480,2214,2216],{"id":2215},"run-it-yourself","Run it yourself",[694,2218,2223],{"className":2219,"code":2220,"filename":2221,"language":2222,"meta":700,"style":700},"language-bash shiki shiki-themes material-theme-lighter material-theme material-theme-palenight","cd packages\u002Fevlog\n\npnpm run bench                          # all benchmarks\npnpm exec vitest bench bench\u002Fcomparison\u002F # vs alternatives only\npnpm exec tsx bench\u002Fscripts\u002Fsize.ts     # bundle size\n","Terminal","bash",[475,2224,2225,2233,2239,2255,2273],{"__ignoreMap":700},[704,2226,2227,2230],{"class":706,"line":707},[704,2228,2229],{"class":722},"cd",[704,2231,2232],{"class":742}," packages\u002Fevlog\n",[704,2234,2235],{"class":706,"line":784},[704,2236,2238],{"emptyLinePlaceholder":2237},true,"\n",[704,2240,2241,2245,2248,2251],{"class":706,"line":839},[704,2242,2244],{"class":2243},"sBMFI","pnpm",[704,2246,2247],{"class":742}," run",[704,2249,2250],{"class":742}," bench",[704,2252,2254],{"class":2253},"sHwdD","                          # all benchmarks\n",[704,2256,2257,2259,2262,2265,2267,2270],{"class":706,"line":884},[704,2258,2244],{"class":2243},[704,2260,2261],{"class":742}," exec",[704,2263,2264],{"class":742}," vitest",[704,2266,2250],{"class":742},[704,2268,2269],{"class":742}," bench\u002Fcomparison\u002F",[704,2271,2272],{"class":2253}," # vs alternatives only\n",[704,2274,2275,2277,2279,2282,2285],{"class":706,"line":935},[704,2276,2244],{"class":2243},[704,2278,2261],{"class":742},[704,2280,2281],{"class":742}," tsx",[704,2283,2284],{"class":742}," bench\u002Fscripts\u002Fsize.ts",[704,2286,2287],{"class":2253},"     # bundle size\n",[2289,2290,2291],"style",{},"html pre.shiki code .spNyl, html code.shiki .spNyl{--shiki-light:#9C3EDA;--shiki-default:#C792EA;--shiki-dark:#C792EA}html pre.shiki code .sTEyZ, html code.shiki .sTEyZ{--shiki-light:#90A4AE;--shiki-default:#EEFFFF;--shiki-dark:#BABED8}html pre.shiki code .sMK4o, html code.shiki .sMK4o{--shiki-light:#39ADB5;--shiki-default:#89DDFF;--shiki-dark:#89DDFF}html pre.shiki code .s2Zo4, html code.shiki .s2Zo4{--shiki-light:#6182B8;--shiki-default:#82AAFF;--shiki-dark:#82AAFF}html pre.shiki code .swJcz, html code.shiki .swJcz{--shiki-light:#E53935;--shiki-default:#F07178;--shiki-dark:#F07178}html pre.shiki code .sfazB, html code.shiki .sfazB{--shiki-light:#91B859;--shiki-default:#C3E88D;--shiki-dark:#C3E88D}html pre.shiki code .sbssI, html code.shiki .sbssI{--shiki-light:#F76D47;--shiki-default:#F78C6C;--shiki-dark:#F78C6C}html .light .shiki span {color: var(--shiki-light);background: var(--shiki-light-bg);font-style: var(--shiki-light-font-style);font-weight: var(--shiki-light-font-weight);text-decoration: var(--shiki-light-text-decoration);}html.light .shiki span {color: var(--shiki-light);background: var(--shiki-light-bg);font-style: var(--shiki-light-font-style);font-weight: var(--shiki-light-font-weight);text-decoration: var(--shiki-light-text-decoration);}html .default .shiki span {color: var(--shiki-default);background: var(--shiki-default-bg);font-style: var(--shiki-default-font-style);font-weight: var(--shiki-default-font-weight);text-decoration: var(--shiki-default-text-decoration);}html .shiki span {color: var(--shiki-default);background: var(--shiki-default-bg);font-style: var(--shiki-default-font-style);font-weight: var(--shiki-default-font-weight);text-decoration: var(--shiki-default-text-decoration);}html .dark .shiki span {color: var(--shiki-dark);background: var(--shiki-dark-bg);font-style: var(--shiki-dark-font-style);font-weight: var(--shiki-dark-font-weight);text-decoration: var(--shiki-dark-text-decoration);}html.dark .shiki span {color: var(--shiki-dark);background: var(--shiki-dark-bg);font-style: var(--shiki-dark-font-style);font-weight: var(--shiki-dark-font-weight);text-decoration: var(--shiki-dark-text-decoration);}html pre.shiki code .sBMFI, html code.shiki .sBMFI{--shiki-light:#E2931D;--shiki-default:#FFCB6B;--shiki-dark:#FFCB6B}html pre.shiki code .sHwdD, html code.shiki .sHwdD{--shiki-light:#90A4AE;--shiki-light-font-style:italic;--shiki-default:#546E7A;--shiki-default-font-style:italic;--shiki-dark:#676E95;--shiki-dark-font-style:italic}",{"title":700,"searchDepth":784,"depth":784,"links":2293},[2294,2298,2299,2300,2301,2302,2314],{"id":469,"depth":784,"text":470,"children":2295},[2296,2297],{"id":482,"depth":839,"text":483},{"id":685,"depth":839,"text":686},{"id":1210,"depth":784,"text":1211},{"id":1271,"depth":784,"text":681},{"id":1350,"depth":784,"text":1351},{"id":1433,"depth":784,"text":1434},{"id":1577,"depth":784,"text":1578,"children":2303},[2304,2305,2307,2309,2310,2311,2312,2313],{"id":1581,"depth":839,"text":636},{"id":1667,"depth":839,"text":2306},"Context accumulation (log.set())",{"id":1730,"depth":839,"text":2308},"Event emission (log.emit())",{"id":1805,"depth":839,"text":1806},{"id":1857,"depth":839,"text":61},{"id":1494,"depth":839,"text":349},{"id":1972,"depth":839,"text":1973},{"id":2026,"depth":839,"text":2027},{"id":2120,"depth":784,"text":2121,"children":2315},[2316,2317,2318],{"id":2124,"depth":839,"text":2125},{"id":2189,"depth":839,"text":2190},{"id":2215,"depth":839,"text":2216},"evlog adds ~3µs per request. Faster than pino, consola, and winston in most scenarios while emitting richer, more useful events.","md",[2322,2325],{"label":61,"icon":64,"to":62,"color":2323,"variant":2324},"neutral","subtle",{"label":419,"icon":422,"to":420,"color":2323,"variant":2324},{},{"icon":315},{"title":312,"description":2319},"P2y1W5h7NCZfbOjek7pla765FzgPeifmUTz0akEacdM",[2331,2333],{"title":419,"path":420,"stem":421,"description":2332,"icon":422,"children":-1},"Complete reference for all evlog configuration options including global logger settings, middleware options, environment context, and framework-specific overrides.",{"title":427,"path":428,"stem":429,"description":2334,"icon":430,"children":-1},"Build-time optimizations for any Vite-based framework. Auto-init, debug stripping, source location injection, and optional auto-imports.",1782925716358]