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| author |  Abseil Team <absl-team@google.com> | 2023-11-15 08:34:44 -0800 |
|---|---|---|
| committer |  Copybara-Service <copybara-worker@google.com> | 2023-11-15 08:35:20 -0800 |
| commit | aa146013a1d8c2d9f567ec23f12927f5d838780f (patch) | |
| tree | 3d2f10ece8031e3640da3d0a723074bd45231122 /absl/flags/flag_test_defs.cc | |
| parent | 61ea5d253f152b3be61fcd836b9eaeda669a56a7 (diff) | |
Speed-up absl::Symbolize by ~6x via faster file reads.
absl::Symbolize does tons of tiny reads. Speed this up by switching
from lseek+read to a pread, and by reading more data than requested
into a buffer.
A faster absl::Symbolize will be helpful in tests and when printing
stack traces on /threadz etc.
Results for absl::Symbolize benchmark that exercises uncached behavior
of absl::Symbolize:
```
name old time/op new time/op delta
BM_Symbolize 16.4ms ±12% 2.6ms ± 0% -84.06% (p=0.001 n=5+9)
```
PiperOrigin-RevId: 582687566
Change-Id: I44caf189d81867f3fd8c050a3100a4b9a8e744d7
Diffstat (limited to 'absl/flags/flag_test_defs.cc')
0 files changed, 0 insertions, 0 deletions