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Replace lru-cache with flru - #18232
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Sep 10, 2026
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PR: Performance 🏃♀️
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Fixes #1, Fixes #2I was looking at https://npmx.dev/package-timeline/@babel/core/v/8.0.1 and notice that the install size of
@babel/coreincreased from 11MB to 12MB in Babel 8:The reason seems to be
lru-cache, which is a whole 2.7MB:We have a very simple usage of it, and this PR replaces with with a much smaller and faster library that does the same thing,
flru: https://github.com/lukeed/flruThis is the first dependency we have from that author and repository has not been touched in years (also, it probably doesn't need to, it's a 20 lines long file), so just in case I'm pinning its version to avoid potential problems.
Note that
lru-cacheis still pulled in as a transitive dependency of@babel/cliand@babel/register, but most users don't use those.