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From "Oleg Kalnichevski (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HTTPCLIENT-925) HttpClient 4.0.1 is approx. 3 time slower then older 3.1 when works against www.google.com
Date Sun, 07 Mar 2010 10:16:29 GMT

    [ https://issues.apache.org/jira/browse/HTTPCLIENT-925?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12842391#action_12842391
] 

Oleg Kalnichevski commented on HTTPCLIENT-925:
----------------------------------------------

> They are absolutely pointless for the absolute values, but are not so much pointless
for side-by-side comparisons 
> (when compared stacks are run at the same time.
> 
> In this case I have run each test many times, looping a pair (TestHttpClient3, TestHttpClient4).
Results were consistent.. 
> So some real difference likely to exists.

Even if you disregard such variable factors as network traffic and load on the target system
by other agents, the simple fact that you are executing thousand requests against a high profile
site in a tight loop from the same IP is quite likely to trigger some kind of DoS defence
mechanism further rendering the results inaccurate.

> and it is the most interesting part - what is so different in requests created by 4.0.1
and 3.1.

User-Agent header

Oleg

> HttpClient 4.0.1 is approx. 3 time slower then older 3.1 when works against www.google.com
> ------------------------------------------------------------------------------------------
>
>                 Key: HTTPCLIENT-925
>                 URL: https://issues.apache.org/jira/browse/HTTPCLIENT-925
>             Project: HttpComponents HttpClient
>          Issue Type: Improvement
>            Reporter: Oleksandr Alesinskyy
>            Priority: Minor
>
> I have tried  benchmarks from httpclient-benchmark - results are some what funny - while
for most tried sites 4.0.1 is marginally faster then 3.1, for a couple of sites it is significantly
slower, the most noticeable for www.google.com, test were repeated multiple times, here are
sample output from 4.0.1 and 3..1  
> *4.0.1*
> Server Software:	gws
> Document URI:		http://www.google.com
> Document Length:	8459 bytes
> Time taken for tests:	3.952 seconds
> Complete requests:	10
> Failed requests:	0
> Content transferred:	84524 bytes
> Requests per second:	2.5303645 [#/sec] (mean)
> Time per request:	395.2 [ms] (mean)
> *3.1*
> Server Software:	gws
> Document URI:		http://www.google.com
> Document Length:	6847 bytes
> Time taken for tests:	1.354 seconds
> Complete requests:	10
> Failed requests:	0
> Content transferred:	68488 bytes
> Requests per second:	7.3855247 [#/sec] (mean)
> Time per request:	135.4 [ms] (mean)
> It is interesting, why.

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