Mercurial > hg > mercurial-crew-with-dirclash
view tests/test-static-http @ 2577:fa76c5d609c9
bdiff: improve worst case behavior by 100x.
on 5.8MB (244.000 lines) text file with similar lines, hash before
this change made diff against empty file take 75 seconds. this change
improves performance to 0.6 seconds. result is that clone of smallish
repo (137MB) with some files like this takes 1 minute instead of 10
minutes.
common case of diff is 10% slower now, probably because of worse cache
locality. but diff does not affect overall performance in common case
(less than 1% of runtime is in diff when it is working ok), so this
tradeoff looks good.
author | Vadim Gelfer <vadim.gelfer@gmail.com> |
---|---|
date | Fri, 07 Jul 2006 15:02:55 -0700 |
parents | d22d730c96ed |
children | 109a22f5434a |
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#!/bin/sh http_proxy= hg clone static-http://localhost:20059/ copy echo $? ls copy 2>/dev/null || echo copy: No such file or directory # This server doesn't do range requests so it's basically only good for # one pull cat > dumb.py <<EOF import BaseHTTPServer, SimpleHTTPServer, signal def run(server_class=BaseHTTPServer.HTTPServer, handler_class=SimpleHTTPServer.SimpleHTTPRequestHandler): server_address = ('localhost', 20059) httpd = server_class(server_address, handler_class) httpd.serve_forever() signal.signal(signal.SIGTERM, lambda x: sys.exit(0)) run() EOF python dumb.py 2>/dev/null & echo $! >> $DAEMON_PIDS mkdir remote cd remote hg init echo foo > bar hg add bar hg commit -m"test" -d "1000000 0" hg tip cd .. http_proxy= hg clone static-http://localhost:20059/remote local cd local hg verify cat bar http_proxy= hg pull kill $!