Optimize manifest.add Testing shows that manifest.add is spending a significant percentage of its time running calcoffsets and doing text = "".join(addlist). This patch removes the need for both of these by storying the manifest in a character array, and using a modified bisect search to find lines without the help of a separate index of line offsets. manifest.add was also reworked to push delta construction/combination into the main loop. Time to apply 2751 patches (without psyco, ext3 noatime,data=writeback): Stock hg: 4m45s real 3m32s user 55s sys patched: 2m48s real 1m53s user 43s sys quilt: 2m30s real 45s user 50s sys (quilt does much more io...)

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#!/bin/sh

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hg init

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cat > .hg/hgrc <<EOF

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[encode]

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*.gz = gunzip

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[decode]

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*.gz = gzip

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EOF

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echo "this is a test" | gzip > a.gz

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hg add a.gz

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hg ci -m "test" -d "0 0"

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echo %% no changes

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hg status

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touch a.gz

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echo %% no changes

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hg status

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echo %% uncompressed contents in repo

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hg debugdata .hg/data/a.gz.d 0

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echo %% uncompress our working dir copy

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gunzip < a.gz

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rm a.gz

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hg co

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echo %% uncompress our new working dir copy

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gunzip < a.gz