increasing website performance

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hello,

i am not satisfied with the performance of my website. is here someone who can give me some tips and instructions?

my website:http://www.shaolinsteyr.at

Websiteenvironment
# concrete5 Version
Core Version - 5.7.5.9
Version Installed - 5.7.5.9
Database Version - 20160615000000
# concrete5 Packages
Easy Image Slider (1.1), Event Calendar PRO (1.5.1), Honest Websites Back To Top (0.9.4), Icons for Redactor (0.9), Minify HTML (1.0), Simple Blog setup (1.0.0), Supermint Theme (3.3.1.3), toesslab - Week Calendar (0.9), Touch Gallery (2.0.3).
# concrete5 Overrides
blocks/page_list/view.php, blocks/page_list/view.css, blocks/page_list, blocks/image_slider/view.css, blocks/image_slider, blocks/topic_list/templates/flat_filter.php, blocks/topic_list/templates, blocks/topic_list/view.css, blocks/topic_list, blocks/form/view.css, blocks/form, css/responsive-slides.css, css/frontend/pagination.css, css/frontend, js/responsive-slides.js, languages/fr_FR/LC_MESSAGES/messages.mo, languages/fr_FR/LC_MESSAGES, languages/fr_FR, languages/nl_NL/LC_MESSAGES/messages.mo, languages/nl_NL/LC_MESSAGES, languages/nl_NL, languages/pt_BR/LC_MESSAGES/messages.mo, languages/pt_BR/LC_MESSAGES, languages/pt_BR, languages/da_DK/LC_MESSAGES/messages.mo, languages/da_DK/LC_MESSAGES, languages/da_DK, languages/it_IT/LC_MESSAGES/messages.mo, languages/it_IT/LC_MESSAGES, languages/it_IT, languages/ru_RU/LC_MESSAGES/messages.mo, languages/ru_RU/LC_MESSAGES, languages/ru_RU, languages/ja_JP/LC_MESSAGES/messages.mo, languages/ja_JP/LC_MESSAGES, languages/ja_JP, languages/tr_TR/LC_MESSAGES/messages.mo, languages/tr_TR/LC_MESSAGES, languages/tr_TR, languages/fi_FI/LC_MESSAGES/messages.mo, languages/fi_FI/LC_MESSAGES, languages/fi_FI, languages/pl_PL/LC_MESSAGES/messages.mo, languages/pl_PL/LC_MESSAGES, languages/pl_PL, languages/de_DE/LC_MESSAGES/messages.mo, languages/de_DE/LC_MESSAGES, languages/de_DE, languages/sv_SE/LC_MESSAGES/messages.mo, languages/sv_SE/LC_MESSAGES, languages/sv_SE, languages/nb_NO/LC_MESSAGES/messages.mo, languages/nb_NO/LC_MESSAGES, languages/nb_NO, languages/es_PY/LC_MESSAGES/messages.mo, languages/es_PY/LC_MESSAGES, languages/es_PY, languages/el_GR/LC_MESSAGES/messages.mo, languages/el_GR/LC_MESSAGES, languages/el_GR, blocks/page_list/view.php, blocks/page_list/view.css, blocks/page_list, blocks/image_slider/view.css, blocks/image_slider, blocks/topic_list/templates/flat_filter.php, blocks/topic_list/templates, blocks/topic_list/view.css, blocks/topic_list, blocks/form/view.css, blocks/form, css/responsive-slides.css, css/frontend/pagination.css, css/frontend, js/responsive-slides.js, languages/fr_FR/LC_MESSAGES/messages.mo, languages/fr_FR/LC_MESSAGES, languages/fr_FR, languages/nl_NL/LC_MESSAGES/messages.mo, languages/nl_NL/LC_MESSAGES, languages/nl_NL, languages/pt_BR/LC_MESSAGES/messages.mo, languages/pt_BR/LC_MESSAGES, languages/pt_BR, languages/da_DK/LC_MESSAGES/messages.mo, languages/da_DK/LC_MESSAGES, languages/da_DK, languages/it_IT/LC_MESSAGES/messages.mo, languages/it_IT/LC_MESSAGES, languages/it_IT, languages/ru_RU/LC_MESSAGES/messages.mo, languages/ru_RU/LC_MESSAGES, languages/ru_RU, languages/ja_JP/LC_MESSAGES/messages.mo, languages/ja_JP/LC_MESSAGES, languages/ja_JP, languages/tr_TR/LC_MESSAGES/messages.mo, languages/tr_TR/LC_MESSAGES, languages/tr_TR, languages/fi_FI/LC_MESSAGES/messages.mo, languages/fi_FI/LC_MESSAGES, languages/fi_FI, languages/pl_PL/LC_MESSAGES/messages.mo, languages/pl_PL/LC_MESSAGES, languages/pl_PL, languages/de_DE/LC_MESSAGES/messages.mo, languages/de_DE/LC_MESSAGES, languages/de_DE, languages/sv_SE/LC_MESSAGES/messages.mo, languages/sv_SE/LC_MESSAGES, languages/sv_SE, languages/nb_NO/LC_MESSAGES/messages.mo, languages/nb_NO/LC_MESSAGES, languages/nb_NO, languages/es_PY/LC_MESSAGES/messages.mo, languages/es_PY/LC_MESSAGES, languages/es_PY, languages/el_GR/LC_MESSAGES/messages.mo, languages/el_GR/LC_MESSAGES, languages/el_GR
# concrete5 Cache Settings
Block Cache - On
Overrides Cache - On
Full Page Caching - On - If blocks on the particular page allow it.
Full Page Cache Lifetime - Only when manually removed or the cache is cleared.
# Server Software
Apache

View Replies:
bobhy replied on at Permalink Reply
I'd recommend you provide some more detail on what specific aspects of your site are being unsatisfactory, as well as what level of performance you are expecting. Maybe you're simply expecting too much? But if not, then let's dive into detail: is everything about the site slow? Only the editing experience? Is it just the home page, but not other pages? And what caching setting do you currently have enabled (Under System Settings)?

That will give the forum some concrete information to engage with.

In the meantime, I'll share one very helpful point that I gleaned from reading other posts talking about poor performance: these external websites that will access your site and provide a performance report:

http://gtmetrix.com/
https://developers.google.com/speed/pagespeed/insights/......

I ran the latter on my site, which is running too slow for my tastes as well. It called out slow loading of these resources
:
jQuery.js
bootstrap-modified-min.css
font-awesome.css.

Probably all C5 sites use these. I'm going to try using versions of these hosted by content delivery networks (CDN's) and see what happens.

Apparently, Concrete5 uses a modified version of Bootstrap, but I'm going to try the standard one on the CDN, another forum member did so and things seemed to work.

I suggest you try running these test tools on your site, too.
siton replied on at Permalink Reply
siton
Also try this site (great resource):
http://varvy.com/pagespeed/

And:
http://tools.pingdom.com/

This is not specific Concrete5 issue (You must learn this issues and implement them in your site). For example In your site you have a lot of JS scripts even in "only text" pages.
bobhy replied on at Permalink Reply
Thanks for the additional perf sites. http://varvy.com/pagespeed/ looks especially detailed!

But I do think C5 could install the site such that these perf testers don't find so much low-hanging fruit. My results (above) come from a newly installed C5 site running Elemental theme, fresh from the installer, where the only tuning I have done so far is to enable all the caching except for whole-page caching in System.

I guess these can be fixed by editing theme files and the browser cache enable is an Apache setting, so I can (eventually) make these changes myself. But the c5 installer could also offer to change these settings for me, and it would be a much appreciated enhancement.