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Re: [Per-Entity] Latency figures for CDNs


Chronological Thread 
  • From: Patrick Radtke <>
  • To: Tom Scavo <>
  • Cc: Per-Entity Metadata Working Group <>
  • Subject: Re: [Per-Entity] Latency figures for CDNs
  • Date: Tue, 6 Sep 2016 10:02:36 -0700
  • Ironport-phdr: 9a23:ZsCVLxE+GM90IYNyOVjDR51GYnF86YWxBRYc798ds5kLTJ75p82wAkXT6L1XgUPTWs2DsrQf1LqQ7vurADFIyK3CmU5BWaQEbwUCh8QSkl5oK+++Imq/EsTXaTcnFt9JTl5v8iLzG0FUHMHjew+a+SXqvnY6Uy/yPgttJ+nzBpWaz4Huj7jzqNXvZFB0gz/1Wrh7MhL++RnLrcIfn4xKJaM4yx+PqXxNLbd432RtcGqagwz97cT4xpdv7ydd86Y5/tJaUK75V685V6ZFFzUqPmYp5dH68xLESF3ctTMnTmwKn08QUED+5xbgU8K063Oiuw==

On Tue, Sep 6, 2016 at 8:15 AM, Tom Scavo
<>
wrote:
>> 175-200 ms from home.
>
> I'd be interested to know how much of that is DNS resolution, how much
> is connection time, and how much is actually due to data preparation
> (as opposed to data transfer).

Here is the data using a couple runs with these curl timing outputs
%{time_namelookup}:%{time_connect}:%{time_pretransfer}:%{time_starttransfer}:%{time_total}

0.004:0.089:0.089:0.300:0.302
0.005:0.091:0.091:0.181:0.182
$ Flush dns cache
0.132:0.216:0.216:0.301:0.304
0.005:0.088:0.088:0.174:0.175
$ Flush dns cache
0.135:0.219:0.219:0.305:0.307


-Patrick



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