Add multi-process support to --check. #2638
Merged
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Set the parameter --num_threads to the desired number of worker tasks to potentially speed up --check.
This works by spawning multiple sub-proccesses that each run the desired diagnostics on a subset of the workspace. Each process will still load and compile the entire workspace, so there are diminishing returns and memory usage increases linearly with the number of threads.
Overall this can reduce the runtime by about ~50% for my projects, example results:
Workspace 1, dominated by a few large/complex files
1 thread: 49.7 seconds
2 threads: 31.8 seconds
4 threads: 23.6 seconds
8 threads: 24.4 seconds
Workspace 2, large number of small-ish files
1 thread: 96.0 seconds
2 threads: 76.5 seconds
4 threads: 49.5 seconds
8 threads: 38.1 seconds