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authorBartosz Golaszewski <bartekgola@gmail.com>2014-11-27 13:20:24 +0100
committerDenys Vlasenko <vda.linux@googlemail.com>2014-11-27 23:31:58 +0100
commit8d75d794ea505003fddea8e757d43976db8d6861 (patch)
tree0aae42250953ae1de36666aa5fc12a11ad3be02f /shell/hush_test/hush-misc/nommu2.right
parentee41094b809452fdd23d25c1879a96acfcddde08 (diff)
downloadbusybox-8d75d794ea505003fddea8e757d43976db8d6861.tar.gz
libbb: use sendfile() to copy data between file descriptors
Busybox already uses sendfile in httpd. This patch proposes to use it globally to copy data between file descriptors. It speeds up the copying on slow systems a lot - below are the times needed to copy a 450Mb file with and without this option enabled on a BeagleBone Black: sendfile: user 0m0.000s sys 0m8.170s read/write 4k: user 0m0.470s sys 0m16.300s function old new delta bb_full_fd_action 394 474 +80 Signed-off-by: Bartosz Golaszewski <bartekgola@gmail.com> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
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