We use the dry-run mode for running benchmarks in a test. This is
important, but doesn't need to use large batches of files. Doing so
would cause the compilation benchmark to become excessively slow,
especially on GitHub runners.
Sadly, Google Benchmark doesn't expose its dry-run mode, but we already
have our own `main` function that injects custom logic for our
benchmarks. Extend that to detect the dry run flags and environment
variables so that we can customize the benchmark behavior in that mode.
Then we use that detection to reduce the batch size.
Also cleans up the counters computation to both be a bit better
organized (I think), and to avoid keeping the tokenized buffers we build
to count tokens around during the timed running of the benchmark.
Also cleans up a bug in some clamping code spotted while fixing this.
Assisted-by: Antigravity with Gemini
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Co-authored-by: Dana Jansens <danakj@orodu.net>
Consolidates both main libraries into `//testing/base`, and factors out
the exe path handling for benchmarks and unit tests into a common
library to remove duplication. Refactors how that logic is managed to be
cleaner and avoid a confusing bool that came up in code review.
Updates all the tests and benchmarks that use these. I still need to
update other benchmarks to use the same main, but I wanted to keep this
PR somewhat minimal.
This also fixes a bug noticed in passing that the compilation benchmark
didn't have the required dependency on the benchmark library itself,
just the benchmark main library.
Chandler CarruthandDana Jansens