tests/test-cat
author Matt Mackall <mpm@selenic.com>
Thu, 11 Oct 2007 00:46:54 -0500
changeset 5451 0a43875677b1
parent 1933 7544700fd931
permissions -rwxr-xr-x
revlog: break up compression of large deltas Python's zlib apparently makes an internal copy of strings passed to compress(). To avoid this, compress strings 1M at a time, then join them at the end if the result would be smaller than the original. For initial commits of large but compressible files, this cuts peak memory usage nearly in half.
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#!/bin/sh
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#
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mkdir t
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cd t
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hg init
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echo 0 > a
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echo 0 > b
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hg ci -A -m m -d "1000000 0"
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hg rm a
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hg cat a
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sleep 1 # make sure mtime is changed
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echo 1 > b
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hg ci -m m -d "1000000 0"
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echo 2 > b
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hg cat -r 0 a
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hg cat -r 0 b
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hg cat -r 1 a
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hg cat -r 1 b