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Default to external diff? #229

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behdad opened this issue Aug 20, 2022 · 1 comment
Open

Default to external diff? #229

behdad opened this issue Aug 20, 2022 · 1 comment

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@behdad
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behdad commented Aug 20, 2022

fdiff is great!

Internal python diff is way too slow on large strings. Maybe default to external unix diff command if available? That one is instantanous.
@behdad
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behdad commented Aug 20, 2022

Eg. for comparing two fonts which are similar except for a couple lines, with ttx that is 53MB, fdiff by default takes ... well, I interrupted it after 4 minutes.

With external diff it takes 5s, most of which is the conversion to ttx. Diffing the ttx'es using unix diff takes only .3s.

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