Diazo performance problem

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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