curl-library
Re: HTTPS CURL get slow when calling at first time
Date: Tue, 27 Nov 2012 22:49:54 +0100
On Tue, Nov 27, 2012 at 08:42:41PM +0100, Oscar Koeroo wrote:
> Have you Wiresharked an empty SSL handshake? It is interesting to see how
> fast your TCP/IP is handhaking and the latency from SSL/TLS Client Hello and
> Server Hello to a complete session. IMHO guessing is inefficient, measuring
> is the start of science.
Another big potential source of latency on startup is the DNS lookup. A
few bad DNS servers in the lookup path, or a misconfigured name service
switch config could potentially add up to 40 seconds of delay.
Subsequent connects wouldn't see that delay because the results would be
cached for a while.
>>> Dan
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Received on 2012-11-27