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| author |  Abseil Team <absl-team@google.com> | 2024-03-19 08:53:29 -0700 |
|---|---|---|
| committer |  Copybara-Service <copybara-worker@google.com> | 2024-03-19 08:54:28 -0700 |
| commit | fa6a3cd6c9e9f01164a0e4b5d2d8f0dbd1453fee (patch) | |
| tree | 4c44e9090027326fb8914bbc3a29a032a24e50e1 | |
| parent | a41e0168bf2e4f071adc145e0ea8ccec767cd98f (diff) | |
Add a note about the cost of `VLOG` in non-debug builds.
PiperOrigin-RevId: 617186944
Change-Id: Id540fb42b02f24ad92b8f3898231f01ac004e191
| -rw-r--r-- | absl/log/log.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/absl/log/log.h b/absl/log/log.h index 90415fa8..a4e1d1fe 100644 --- a/absl/log/log.h +++ b/absl/log/log.h @@ -233,6 +233,11 @@ // // See vlog_is_on.h for further documentation, including the usage of the // --vmodule flag to log at different levels in different source files. +// +// `VLOG` does not produce any output when verbose logging is not enabled. +// However, simply testing whether verbose logging is enabled can be expensive. +// If you don't intend to enable verbose logging in non-debug builds, consider +// using `DVLOG` instead. #define VLOG(severity) ABSL_LOG_INTERNAL_VLOG_IMPL(severity) // `DVLOG` behaves like `VLOG` in debug mode (i.e. `#ifndef NDEBUG`). |