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9b2caf34f5When a transfer leaves its DID state and goes to PERFORM, it should not hog the multi processing when there are other transfers alive. Make multistate_did() return CURLM_OK then which triggers the processing of the next easy handle. This gives more fairness among easy handles: - on a fast server, responses may arrive very quickly and processing a response is costly. All this time is then lost to other transfers that have not even sent their request - on a slow server, directly trying to receive the response will not work and is an unnecessary network call. Local scorecard tests with h1 requests showed that the former handling was only using 10 connections for 40 parallel requests after an initial peak of 40 connections. The change makes libcurl use all 40 connections continuously. This also explains the h1-requests memory use development. When we closed connections more aggressively, the 40 initial connections shrank and released their memory. But the parallelism was not good. Closes #22763 |
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curl is a command-line tool for transferring data from or to a server using URLs. It supports these protocols: DICT, FILE, FTP, FTPS, GOPHER, GOPHERS, HTTP, HTTPS, IMAP, IMAPS, LDAP, LDAPS, MQTT, MQTTS, POP3, POP3S, RTSP, SCP, SFTP, SMB, SMBS, SMTP, SMTPS, TELNET, TFTP, WS and WSS.
Learn how to use curl by reading the man page or everything curl.
Find out how to install curl by reading the INSTALL document.
libcurl is the library curl is using to do its job. It is readily available to be used by your software. Read the libcurl man page to learn how.
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