[crater] Report size differences - Githubissues

googlefonts / fontc

Where in we pursue oxidizing (context: https://github.com/googlefonts/oxidize) fontmake.

Apache License 2.0

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[crater] Report size differences #1100

Closed cmyr closed 2 weeks ago

cmyr commented 2 weeks ago

This is a bit hacky, because comparing size doesn't really work like difference, but I've squeezed it into a shape where it seems to work okay?

It basically works like this:

for each table produced by both compilers, we find the ratio of their sizes
if the ratio exceeds a threshold (currently 1/10) then we add it to the the report
in the actual report, we just display these size differences as a delta, in bytes. Negative numbers mean that fontc is smaller than fontmake, and positive numbers mean the inverse.