Dhruv Manilawala 6f7d3cc798 Add option (-o/--output-file) to write output to a file (#4950) ... ## Summary A new CLI option (`-o`/`--output-file`) to write output to a file instead of stdout. Major change is to remove the lock acquired on stdout. The argument is that the output is buffered and thus the lock is acquired only when writing a block (8kb). As per the benchmark below there is a slight performance penalty. Reference: https://rustmagazine.org/issue-3/javascript-compiler/#printing-is-slow ## Benchmarks _Output is truncated to only contain useful information:_ Command: `check --isolated --no-cache --select=ALL --show-source ./test-repos/cpython"` Latest HEAD (361d45f2b2) with and without the manual lock on stdout: ```console Benchmark 1: With lock Time (mean ± σ): 5.687 s ± 0.075 s [User: 17.110 s, System: 0.486 s] Range (min … max): 5.615 s … 5.860 s 10 runs Benchmark 2: Without lock Time (mean ± σ): 5.719 s ± 0.064 s [User: 17.095 s, System: 0.491 s] Range (min … max): 5.640 s … 5.865 s 10 runs Summary (1) ran 1.01 ± 0.02 times faster than (2) ``` This PR: ```console Benchmark 1: This PR Time (mean ± σ): 5.855 s ± 0.058 s [User: 17.197 s, System: 0.491 s] Range (min … max): 5.786 s … 5.987 s 10 runs Benchmark 2: Latest HEAD with lock Time (mean ± σ): 5.645 s ± 0.033 s [User: 16.922 s, System: 0.495 s] Range (min … max): 5.600 s … 5.712 s 10 runs Summary (2) ran 1.04 ± 0.01 times faster than (1) ``` ## Test Plan Run all of the commands which gives output with and without the `--output-file=ruff.out` option: * `--show-settings` * `--show-files` * `--show-fixes` * `--diff` * `--select=ALL` * `--select=All --show-source` * `--watch` (only stdout allowed) resolves: #4754		2023-06-20 22:16:49 +05:30
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resources/test/fixtures/cache_mutable	Open cache files in parallel (#5120)	2023-06-20 17:43:09 +02:00
src	Add option (-o/--output-file) to write output to a file (#4950)	2023-06-20 22:16:49 +05:30
tests	Add rule documentation URL to JSON output (#5187)	2023-06-19 21:09:15 +00:00
Cargo.toml	Only use a single cache file per Python package (#5117)	2023-06-19 17:46:13 +02:00