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a strlen update
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From: Daniel Stenberg via curl-library <curl-library_at_lists.haxx.se>
Date: Thu, 10 Feb 2022 09:27:01 +0100 (CET)
Hello,
In a previous mail here [1], I counted strlens done by curl. This then
triggered some work, mostly by Henrik Holst, to update code to not use
strlen() unnecessarily when it can avoid it.
I did a quick follow-up count today. I don't recall the exact build options I
used the last time, so I rebuilt 7.81.0 and current git master with the same
set now and ran a comparison:
ltrace ./src/curl -Ls https://google.com/ -o /dev/null 2>&1 | grep strlen
In 7.81.0 this made 596 to 600 strlen() calls.
In git master, this now makes 390 to 392 calls. A 33% reduction.
(This used OpenSSL/1.1.1m and google.com speaks HTTP/2 and as said before,
makes a redirect)
[1] = https://curl.se/mail/lib-2022-01/0125.html
Date: Thu, 10 Feb 2022 09:27:01 +0100 (CET)
Hello,
In a previous mail here [1], I counted strlens done by curl. This then
triggered some work, mostly by Henrik Holst, to update code to not use
strlen() unnecessarily when it can avoid it.
I did a quick follow-up count today. I don't recall the exact build options I
used the last time, so I rebuilt 7.81.0 and current git master with the same
set now and ran a comparison:
ltrace ./src/curl -Ls https://google.com/ -o /dev/null 2>&1 | grep strlen
In 7.81.0 this made 596 to 600 strlen() calls.
In git master, this now makes 390 to 392 calls. A 33% reduction.
(This used OpenSSL/1.1.1m and google.com speaks HTTP/2 and as said before,
makes a redirect)
[1] = https://curl.se/mail/lib-2022-01/0125.html
-- / daniel.haxx.se | Commercial curl support up to 24x7 is available! | Private help, bug fixes, support, ports, new features | https://curl.se/support.html -- Unsubscribe: https://lists.haxx.se/listinfo/curl-library Etiquette: https://curl.haxx.se/mail/etiquette.htmlReceived on 2022-02-10