вот что говорит один форум:
I have Tips and Trick for increase your site Performance. You can try these tips :
1. Optimize your Database :
- Open PHPMyAdmin - choose your Database name
- Choose 'Check All' option, until your all table is checked
- At Drop down menu, choose 'Optimize table'
2. If you are using many pictures on your web, optimize your picture with Irfan View program. It's powerful picture optimize program and recommended from many people
3. Please don't use very many table on your site, because it's make your site load is very slowlyвот некоторые результаты тестирований с разными компонентами СЕО
конфиг- Joomla 1.5.17 VirtueMart 1.1.4 JoomFish 2.04 SEF404 vmSEFпри выключенном стандартном SEF, без VMSEF, без route.phpпросмотр списка категорийProfile Information
Application afterLoad: 0.001 seconds, 0.30 MB
Application afterInitialise: 1.181 seconds, 5.40 MB
Application afterRoute: 1.212 seconds, 5.93 MB
Application afterDispatch: 1.399 seconds, 10.45 MB
Application afterRender:
1.471 seconds, 11.78 MB
Memory Usage
12398952
29 queries loggedпросмтотр всех(36)товаров категорииProfile Information
Application afterLoad: 0.003 seconds, 0.30 MB
Application afterInitialise: 1.234 seconds, 5.38 MB
Application afterRoute: 1.265 seconds, 5.91 MB
Application afterDispatch: 3.204 seconds, 13.05 MB
Application afterRender:
3.318 seconds, 13.81 MB
Memory Usage
14527184
702 queries loggedпри выключенном стандартном SEF, без VMSEF, без route.phpпросмотр списка категорийProfile Information
Application afterLoad: 0.003 seconds, 0.30 MB
Application afterInitialise: 1.160 seconds, 5.43 MB
Application afterRoute: 1.185 seconds, 5.96 MB
Application afterDispatch: 1.375 seconds, 10.48 MB
Application afterRender:
1.449 seconds, 11.82 MB
Memory Usage
12440784
29 queries loggedпросмтотр всех(36)товаров категорииProfile Information
Application afterLoad: 0.003 seconds, 0.30 MB
Application afterInitialise: 1.210 seconds, 5.41 MB
Application afterRoute: 1.240 seconds, 5.94 MB
Application afterDispatch: 2.937 seconds, 12.75 MB
Application afterRender:
3.051 seconds, 13.62 MB
Memory Usage
14334400
562 queries loggedпри включенном стандартном SEF, при включенном SEF404 (с кешированием)просмотр списка категорийProfile Information
Application afterLoad: 0.001 seconds, 0.30 MB
Application afterInitialise: 1.102 seconds, 5.62 MB
Application afterRoute: 1.188 seconds, 7.83 MB
Application afterDispatch: 1.444 seconds, 12.77 MB
Application afterRender:
1.526 seconds, 14.14 MB
Memory Usage
14924776
76 queries loggedпросмтотр всех(36)товаров категорииProfile Information
Application afterLoad: 0.003 seconds, 0.30 MB
Application afterInitialise: 1.140 seconds, 5.65 MB
Application afterRoute: 1.242 seconds, 8.12 MB
Application afterDispatch: 3.270 seconds, 15.13 MB
Application afterRender:
3.388 seconds, 16.02 MB
Memory Usage
16902928
730 queries loggedпри включенном стандартном SEF, при включенном VMSEF (с кешированием)просмотр списка категорийProfile Information
Application afterLoad: 0.003 seconds, 0.30 MB
Application afterInitialise: 0.632 seconds, 3.91 MB
Application afterRoute: 0.650 seconds, 4.41 MB
Application afterDispatch: 0.974 seconds, 10.21 MB
Application afterRender:
1.071 seconds, 11.55 MB
Memory Usage
12203336
53 queries loggedпросмтотр всех(36)товаров категорииProfile Information
Application afterLoad: 0.001 seconds, 0.30 MB
Application afterInitialise: 0.612 seconds, 3.88 MB
Application afterRoute: 0.642 seconds, 4.39 MB
Application afterDispatch: 1.783 seconds, 12.20 MB
Application afterRender:
1.851 seconds, 13.01 MB
Memory Usage
13738256
193 queries loggedhttp://joomla-support.ru/showthread.php?p=93253#post93253 VMSEF брал отсюда-проблемы с переводом на мультиязычных сайтах не решены, но плагин хороший
ВЫВОДЫ (имхо)как видно из результатов-лучший вариант использовать обычныый route.php (но к нему нужно делать хак для вывода тайтлов, дескрипшена, метаданых итд-в виртуемарте этого нет, а на СЕО продвижение сильно влияет)