swebb2066 opened a new pull request, #337:
URL: https://github.com/apache/logging-log4cxx/pull/337
The function scope static variable access in `Level::getInfo() `etc has
unnecessary overhead (10% of logging a message).
The new benchmarks for Ubuntu gcc 11 are:
| Benchmark | Time | CPU | Iterations |
| -------- | ------ | ------ | ------- |
| Testing disabled logging request | 0.472 ns | 0.472 ns | 1000000000 |
| Testing disabled logging request/threads:16 | 0.094 ns | 1.01 ns |
676137360 |
| Logging 5 char string using MessageBuffer, pattern: %m%n | 300 ns | 300
ns | 2327642 |
| Logging 5 char string using MessageBuffer, pattern: %m%n/threads:16 | 511
ns | 4127 ns | 173408 |
| Logging 49 char string using MessageBuffer, pattern: %m%n | 321 ns | 321
ns | 2163479 |
| Logging 49 char string using MessageBuffer, pattern: %m%n/threads:16 |
500 ns | 4030 ns | 166160 |
| Logging int value using MessageBuffer, pattern: %m%n | 512 ns | 512 ns |
1474939 |
| Logging int value using MessageBuffer, pattern: %m%n/threads:16 | 449 ns
| 3666 ns | 165344 |
| Logging int+float using MessageBuffer, pattern: %m%n | 975 ns | 975 ns |
718422 |
| Logging int+float using MessageBuffer, pattern: %m%n/threads:16 | 534 ns
| 4401 ns | 176896 |
| Logging int value using MessageBuffer, pattern: [%d] %m%n | 518 ns | 518
ns | 1348124 |
| Logging int value using MessageBuffer, pattern: [%d] [%c] [%p] %m%n | 520
ns | 520 ns | 1333224 |
| Logging 49 char string using FMT, pattern: %m%n | 314 ns | 314 ns |
2237700 |
| Logging 49 char string using FMT, pattern: %m%n/threads:16 | 448 ns |
3624 ns | 206080 |
| Logging int value using FMT, pattern: %m%n | 313 ns | 313 ns | 2235338 |
| Logging int value using FMT, pattern: %m%n/threads:16 | 380 ns | 3039 ns
| 239872 |
| Logging int+float using FMT, pattern: %m%n | 463 ns | 463 ns | 1509341 |
| Logging int+float using FMT, pattern: %m%n/threads:16 | 487 ns | 3924 ns
| 208816 |
| Async, int value using MessageBuffer, pattern: %m%n | 510 ns | 510 ns |
1484667 |
| Async, int value using MessageBuffer, pattern: %m%n/threads:16 | 440 ns |
3579 ns | 193056 |
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