Mercurial > hg > mercurial-crew-with-dirclash
view tests/test-empty-file @ 5451:0a43875677b1
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.
author | Matt Mackall <mpm@selenic.com> |
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date | Thu, 11 Oct 2007 00:46:54 -0500 |
parents | 7a7d4937272b |
children |
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#!/bin/sh hg init a cd a touch empty1 hg add empty1 hg commit -m 'add empty1' -d '1000000 0' touch empty2 hg add empty2 hg commit -m 'add empty2' -d '1000000 0' hg up -C 0 touch empty3 hg add empty3 hg commit -m 'add empty3' -d '1000000 0' hg heads hg merge 1 # before changeset 05257fd28591, we didn't notice the # empty file that came from rev 1. hg status hg commit -m merge -d '1000000 0' hg manifest --debug tip