swebb2066 commented on issue #347:
URL:
https://github.com/apache/logging-log4cxx/issues/347#issuecomment-1937363148
On Ubuntu gcc 11, the benchmark comparisons using a lock (old) and without
locking (new) in AppenderAttachableImpl::appendLoopOnAppenders are:
| Benchmark | Time | CPU | Time Old | Time New | CPU Old | CPU New |
| -------- | ----- | ----- | ------ | -------- | ------- | ------- |
| Testing disabled logging request | -0.0370 | -0.0365 | 0 | 0 | 0 | 0 |
| Testing disabled logging request/threads:4 | -0.2354 | -0.2353 | 0 | 0 |
1 | 1 |
| Logging 5 char string using MessageBuffer, pattern: %m%n | -0.2278 |
-0.2279 | 311 | 240 | 311 | 240 |
| Logging 5 char string using MessageBuffer, pattern: %m%n/threads:4 |
-0.3315 | -0.3237 | 553 | 370 | 2172 | 1469 |
| Logging 49 char string using MessageBuffer, pattern: %m%n | -0.1668 |
-0.1668 | 318 | 265 | 318 | 265 |
| Logging 49 char string using MessageBuffer, pattern: %m%n/threads:4 |
-0.3456 | -0.3381 | 575 | 376 | 2262 | 1497 |
| Logging int value using MessageBuffer, pattern: %m%n | -0.1342 | -0.1342
| 489 | 423 | 489 | 423 |
| Logging int value using MessageBuffer, pattern: %m%n/threads:4 | -0.4666
| -0.4631 | 593 | 316 | 2345 | 1259 |
| Logging int+float using MessageBuffer, pattern: %m%n | -0.0736 | -0.0736
| 941 | 872 | 941 | 872 |
| Logging int+float using MessageBuffer, pattern: %m%n/threads:4 | -0.3367
| -0.3335 | 754 | 500 | 2997 | 1997 |
| Logging int value using MessageBuffer, pattern: [%d] %m%n | -0.2144 |
-0.2143 | 627 | 492 | 627 | 492 |
| Logging int value using MessageBuffer, pattern: [%d] [%c] [%p] %m%n |
-0.2166 | -0.2165 | 629 | 493 | 629 | 493 |
| Logging 49 char string using FMT, pattern: %m%n | -0.2071 | -0.2071 | 293
| 232 | 293 | 232 |
| Logging 49 char string using FMT, pattern: %m%n/threads:4 | -0.4621 |
-0.4589 | 537 | 289 | 2114 | 1144 |
| Logging int value using FMT, pattern: %m%n | -0.1490 | -0.1489 | 315 |
268 | 315 | 268 |
| Logging int value using FMT, pattern: %m%n/threads:4 | -0.3587 | -0.3562
| 548 | 351 | 2162 | 1392 |
| Logging int+float using FMT, pattern: %m%n | -0.1278 | -0.1278 | 468 |
408 | 468 | 408 |
| Logging int+float using FMT, pattern: %m%n/threads:4 | -0.1714 | -0.1653
| 429 | 356 | 1700 | 1419 |
| Async, int value using MessageBuffer, pattern: %m%n | -0.1403 | -0.1403 |
493 | 424 | 493 | 424 |
| Async, int value using MessageBuffer, pattern: %m%n/threads:4 | -0.4647 |
-0.4598 | 680 | 364 | 2683 | 1449 |
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