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a5b8359c1c
Came in handy for tracking down the performance regression in #5219. This will take the output of two (necessarily identical) `fish --profile ...` runs and produce a third profile log in which all times are the difference between the first and the second profile provided. (I'm not sure if build_tools is the right place for it, but I think it's OK?)
46 lines
1.1 KiB
Fish
46 lines
1.1 KiB
Fish
#!/usr/bin/env fish
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#
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# Compares the output of two fish profile runs and emits the time difference between
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# the first and second set of results.
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#
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# Usage: ./diff_profiles.fish profile1.log profile2.log > profile_diff.log
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set profile1 (cat $argv[1])
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set profile2 (cat $argv[2])
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set line_no 0
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while set next_line_no (math $line_no + 1) && set -q profile1[$next_line_no] && set -q profile2[$next_line_no]
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set line_no $next_line_no
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set line1 $profile1[$line_no]
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set line2 $profile2[$line_no]
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if not string match -qr '^\d+\t\d+' $line1
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echo $line1
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continue
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end
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set results1 (string match -r '^(\d+)\t(\d+)\s+(.*)' $line1)
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set results2 (string match -r '^(\d+)\t(\d+)\s+(.*)' $line2)
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# times from both files
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set time1 $results1[2..3]
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set time2 $results2[2..3]
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# leftover from both files
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set remainder1 $results1[4]
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set remainder2 $results2[4]
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if not string match -q -- $remainder1 $remainder2
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echo Mismatch on line $line_no:
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echo - $remainder1
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echo + $remainder2
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exit 1
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end
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set -l diff
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set diff[1] (math $time1[1] - $time2[1])
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set diff[2] (math $time1[2] - $time2[2])
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echo $diff[1] $diff[2] $remainder1
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end
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