From 96ece5c0eef0ca4953ec306e59fd7aa8d48be793 Mon Sep 17 00:00:00 2001 From: Daniel Stenberg Date: Mon, 24 Apr 2017 12:03:08 +0200 Subject: curl: set a 100K buffer size by default Test command 'time curl http://localhost/80GB -so /dev/null' on a Debian Linux. Before (middle performing run out 9): real 0m28.078s user 0m11.240s sys 0m12.876s After (middle performing run out 9) real 0m26.356s (93.9%) user 0m5.324s (47.4%) sys 0m8.368s (65.0%) Also, doing SFTP over a 200 millsecond latency link is now about 6 times faster. Closes #1446 --- src/tool_operate.c | 10 +++++++--- 1 file changed, 7 insertions(+), 3 deletions(-) (limited to 'src/tool_operate.c') diff --git a/src/tool_operate.c b/src/tool_operate.c index 0e84ac398..724826c8e 100644 --- a/src/tool_operate.c +++ b/src/tool_operate.c @@ -246,6 +246,8 @@ static void setfiletime(long filetime, const char *filename, #endif /* defined(HAVE_UTIME) || \ (defined(WIN32) && (CURL_SIZEOF_CURL_OFF_T >= 8)) */ +#define BUFFER_SIZE (100*1024) + static CURLcode operate_do(struct GlobalConfig *global, struct OperationConfig *config) { @@ -888,10 +890,12 @@ static CURLcode operate_do(struct GlobalConfig *global, my_setopt(curl, CURLOPT_SEEKDATA, &input); my_setopt(curl, CURLOPT_SEEKFUNCTION, tool_seek_cb); - if(config->recvpersecond) - /* tell libcurl to use a smaller sized buffer as it allows us to - make better sleeps! 7.9.9 stuff! */ + if(config->recvpersecond && + (config->recvpersecond < BUFFER_SIZE)) + /* use a smaller sized buffer for better sleeps */ my_setopt(curl, CURLOPT_BUFFERSIZE, (long)config->recvpersecond); + else + my_setopt(curl, CURLOPT_BUFFERSIZE, (long)BUFFER_SIZE); /* size of uploaded file: */ if(uploadfilesize != -1) -- cgit v1.2.3