Min-Yih Hsu
83e0a49ba4
llvm: Add support for collecting time trace ( #8546 )
...
LLVM time profiler can collect time traces and present them in a
hierarchical view. Which breakdowns the time spent in each Pass or even
IR unit. The result is also exported into a format that can be easily
visualized by the Chrome browser.
Currently this features is controlled by the following environment
variables:
- `ZIG_LLVM_TIME_TRACE_FILE` toggles this feature and specifies the
output time trace file.
- `ZIG_LLVM_TIME_TRACE_GRANULARITY` controls the time granularity in
ms (default to 500).
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