This is a less known tool but sometimes it has better performance. Test image attached. While optipng, advpng, smushit can't do anything, pngnq reduces size from 84 KB to 36 KB.
pngnq is available as a Debian package.
Postponed
1.0
Code
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It's likely this issue predates Contrib.social: some issue and comment data are missing.
It seems ideal to fix #2992359: Use the symfony process component → before working on any more binaries. Additional binaries should ideally be written using the symfony process compontent. Marking this as postponed on that.