Sorry, missed your mail on Sunday .. Yes, version is 7.31.0
Not sure what resolver backend I can choose - I did not change any code in my application except the curl version. All connections go to 'localhost' so I assume no dns resolver is used. The increasing sleep time looks perfect, works fine in the application - all requests work with without_fds <= 4 so have minimal delay. I still have no idea why curl_multi_wait() returns then without a socket to wait for - probably Windows needs some time to provide sockets. Thanks, Andreas -----Ursprüngliche Nachricht----- Von: curl-library [mailto:curl-library-boun...@cool.haxx.se] Im Auftrag von Daniel Stenberg Gesendet: Sonntag, 14. Juli 2013 17:07 An: libcurl development Betreff: Re: HTTP requests often take longer (150 milliseconds) in latest cURL On Fri, 12 Jul 2013, Andreas Malzahn wrote: > When upgrading our application from cURL version 1.25 to 1.31, many > HTTP requests take now longer - time increased from 40- 60ms to 151ms. First, I assume you're talking about 7.25.x to 7.31.0. Then, what resolver backend are you using now and did you use the same one before? > Is there a special reason for the 50ms wait? To avoid busy-looping - since there's no external event to trigger the end of the wait we need to keep checking. > Maybe this is some bug and 5-10ms wait would be better? How about starting off with that and then gradually increasing the sleep time to avoid looping very many times? Somethnig like this: --- a/lib/easy.c +++ b/lib/easy.c @@ -533,9 +533,7 @@ CURLcode curl_easy_perform(CURL *easy) if(curlx_tvdiff(after, before) <= 10) { without_fds++; if(without_fds > 2) { - int sleep_ms = without_fds * 50; - if(sleep_ms > 1000) - sleep_ms = 1000; + int sleep_ms = without_fds < 10 ? (1 << (without_fds-1)): + 1000; Curl_wait_ms(sleep_ms); } } -- / daniel.haxx.se ------------------------------------------------------------------- List admin: http://cool.haxx.se/list/listinfo/curl-library Etiquette: http://curl.haxx.se/mail/etiquette.html ------------------------------------------------------------------- List admin: http://cool.haxx.se/list/listinfo/curl-library Etiquette: http://curl.haxx.se/mail/etiquette.html