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Increased secure connection latency
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Increased secure connection latency
01-30-2014, 01:57 AM
Post: #1
Increased secure connection latency
I've noticed increased secure connection latency between DNS lookup and Initial Connections on many (but not all) of our HTTPS requests since about Jan 6th for our subdomains and 3rd parties alike.

Before -
After -

I've done some research and found that there's been a big shift in the industry from 1024-bit encryption to 2048-bit encryption between late 2013 and now. We're using 2048-bit encryption on our web servers. I know encrypting a longer key takes more time and CPU. Is it possible the test agents we're using through WPT are getting CPU bound? I can't figure out where this timing gap is coming from between DNS Lookup and Initial Connection all of the sudden.

We've checked our web servers and their CPU thresholds are fine. However we're still seeing recurring HTTPS connection latencies that are pushing out Fully Loaded Times by 1.2+ secs recently.

Any thoughts are greatly appreciated.

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Increased secure connection latency - DigitalJeff - 01-30-2014 01:57 AM

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