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authorTheodore Ts'o <tytso@mit.edu>2007-06-29 17:40:46 (GMT)
committerJunio C Hamano <gitster@pobox.com>2007-07-01 03:16:12 (GMT)
commit06f59e9f5daa06fc4bd51cf4c508b3edd3ed514a (patch)
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parentee36856d8c8c1f8d53650a70d8f61561fb65ba38 (diff)
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Don't fflush(stdout) when it's not helpful
This patch arose from a discussion started by Jim Meyering's patch whose intention was to provide better diagnostics for failed writes. Linus proposed a better way to do things, which also had the added benefit that adding a fflush() to git-log-* operations and incremental git-blame operations could improve interactive respose time feel, at the cost of making things a bit slower when we aren't piping the output to a downstream program. This patch skips the fflush() calls when stdout is a regular file, or if the environment variable GIT_FLUSH is set to "0". This latter can speed up a command such as: GIT_FLUSH=0 strace -c -f -e write time git-rev-list HEAD | wc -l a tiny amount. Signed-off-by: "Theodore Ts'o" <tytso@mit.edu> Acked-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
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