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Coverage: Add 'turbo-cov': a faster reimplementation of llvm-cov · 834c0e7aBen Clayton authored
`llvm-cov` can either emit data in json or lcov formats, where json is the faster of the two. `llvm-cov`'s output is directly piped into regres, where the json is immediately deserialized again. The cost of serializing and deserializing is surprisingly high. This change replaces the use of `llvm-cov` with `turbo-cov`, which simply emits a binary stream and offers up to 3x speed improvement, dramatically lowering the time taken to produce coverage for a full deqp test run. Bug: b/152339534 Change-Id: I9292f3c27e016cf508557edf4da7656db81c2b07 Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/42948Reviewed-by:
Antonio Maiorano <amaiorano@google.com> Tested-by:
Ben Clayton <bclayton@google.com> Kokoro-Presubmit: kokoro <noreply+kokoro@google.com>
834c0e7a
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