Re: Diazo performance problem

This is caused by XPath calls. We've achieved some speed ups by avoiding  xpath expressions with // where possible. 

Dylan Jay

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On 5 Feb 2014, at 1:06 am, Гирман Богдан <[email protected]> wrote:

> Hi,
> 
> I'm investigating a performance issues with diazo.
> With diazo enabled my site loads two times slower than without diazo.
> 
> For testing I use apache benchmark and ZopeProfiler.
> I run 100 request for the front-page with diazo enabled and get from ZopeProfiler:
>    ncalls  tottime  percall  cumtime  percall filename:lineno(function)
>       900   21.015    0.023   21.019    0.023 /home/bogdan/.buildout/eggs/diazo-1.0.4-py2.7.egg/diazo/utils.py:59(__call__)
> 1057912/934100    1.825    0.000    5.994    0.000 {getattr}
>       100    1.661    0.017   29.061    0.291 /home/bogdan/.buildout/eggs/plone.app.theming-1.0.4-py2.7.egg/plone/app/theming/transform.py:200(transformIterable)
> 
> Diazo takes about half of all time for the servicing request.
> ab output:
> Server Software:        Zope/(2.13.21,
> Server Hostname:        localhost
> Server Port:            8080
> 
> Document Path:          /Plone/
> 
> Document Length:        36403 bytes
> 
> 
> Concurrency Level:      1
> Time taken for tests:   58.157 seconds
> Complete requests:      100
> Failed requests:        0
> Write errors:           0
> Total transferred:      3686300 bytes
> 
> HTML transferred:       3640300 bytes
> 
> Requests per second:    1.72 [#/sec] (mean)
> Time per request:       581.567 [ms] (mean)
> Time per request:       581.567 [ms] (mean, across all concurrent requests)
> Transfer rate:          61.90 [Kbytes/sec] received
> 
> 
> Connection Times (ms)
>               min  mean[+/-sd] median   max
> Connect:        0    0   0.0      0       0
> Processing:   529  581  36.8    574     693
> Waiting:      492  576  37.8    569     692
> Total:        529  581  36.8    574     693
> 
> 
> Percentage of the requests served within a certain time (ms)
>   50%    574
>   66%    593
>   75%    608
>   80%    612
>   90%    629
>   95%    667
>   98%    682
>   99%    693
>  100%    693 (longest request)
> 
> 
> 
> 
> I run 100 request for the front-page without diazo enabled:
> ab output:
> 
> Server Software:        Zope/(2.13.21,
> Server Hostname:        127.0.0.1
> Server Port:            8080
> 
> Document Path:          /Plone/
> Document Length:        33387 bytes
> 
> Concurrency Level:      1
> Time taken for tests:   27.629 seconds
> Complete requests:      100
> Failed requests:        0
> Write errors:           0
> Total transferred:      3384700 bytes
> HTML transferred:       3338700 bytes
> Requests per second:    3.62 [#/sec] (mean)
> Time per request:       276.294 [ms] (mean)
> Time per request:       276.294 [ms] (mean, across all concurrent requests)
> Transfer rate:          119.63 [Kbytes/sec] received
> 
> Connection Times (ms)
>               min  mean[+/-sd] median   max
> Connect:        0    0   0.0      0       0
> Processing:   258  276  24.7    271     382
> Waiting:      224  272  24.2    267     381
> Total:        258  276  24.7    271     382
> 
> Percentage of the requests served within a certain time (ms)
>   50%    271
>   66%    273
>   75%    275
>   80%    277
>   90%    289
>   95%    366
>   98%    380
>   99%    382
>  100%    382 (longest request)
> 
> Also I seeing that running 100 requests with ab "diazo/utils.py:59(__call__)" get called 900 times, is it right?
>    ncalls  tottime  percall  cumtime  percall filename:lineno(function)
>       900   21.015    0.023   21.019    0.023 /home/bogdan/.buildout/eggs/diazo-1.0.4-py2.7.egg/diazo/utils.py:59(__call__)
> 1057912/934100    1.825    0.000    5.994    0.000 {getattr}
>       100    1.661    0.017   29.061    0.291 /home/bogdan/.buildout/eggs/plone.app.theming-1.0.4-py2.7.egg/plone/app/theming/transform.py:200(transformIterable)
> 
> 
> I have tested it in foreground mode and in usual mode but the difference in two times between diazo theme enabled and without diazo still present.
> 
> Best regards,
> Bogdan.
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Managing the Performance of Cloud-Based Applications
Take advantage of what the Cloud has to offer - Avoid Common Pitfalls.
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