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Re: curl_global_init performance

From: Dave Reisner <>
Date: Sat, 31 Aug 2013 19:04:25 -0400

On Fri, Aug 30, 2013 at 11:01:20PM +0200, Daniel Stenberg wrote:
> On Fri, 30 Aug 2013, Tim Ruehsen wrote:
> >The 'time' command is not very exact, it gives just a direction. I
> >agree, that in normal situations (user starting curl to download
> >one file), a difference of a few milliseconds do not matter at
> >all. But what about scripts, that download small files in a loop
> >in a fast network... e.g. using wget takes 10s while curl would
> >take 50s ?
> When thinking further about this subject, it struck me that
> SSL_load_error_strings() isn't mentioned to have any multi-threading
> problems in the man page. It should be possible to move to get done
> before the first use of OpenSSL much more easily than I thought
> before.

Is this really true? Assuming that this is to be treated as a singleton,
how do you handle the case where you have multiple threads with a CURL*
handle for each? The openssl code for loading the error strings doesn't
appear to be thread safe despite the lack of any mention otherwise in
the manpage.

> You up to having a go at a patch?

Alternate idea: What about a new option for the curl tool to control the
value passed to curl_global_init? Or something simpler: --ssl and
--nossl flags to "toggle" between CURL_GLOBAL_ALL and

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Received on 2013-09-01