зеркало из https://github.com/mozilla/gecko-dev.git
0e1cc95b5f
This patch changes JS array resizing to always allocate power-of-two sized slot requests. Previously it would mostly make slight-more-than-power-of-two sized requests, which cause lots of slop. Also, shrinkElements() now only does a reallocation if it would result in going down a size class. E.g. if you pop all the elements from a 1000-element array, it would realloc 999, then 998, then 997, all the way down the minimum size. Now it does 512, then 256, down to the minimum size (which is 8). I confirmed with DMD that the element allocations now have zero slop. This reduces peak RSS loading a couple of large PDF files (four times each) with pdf.js by 10s of MiBs. --HG-- extra : rebase_source : 942c11de724843aa582e3a17b02043458a57e594 |
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| xpconnect | ||