Long TTFB always for the fist time every few hours

  • Hi,
    I have a problem with my four different domains. The TTFB (Time To First Byte) is too long for the firs time, after the first visit it is OK, below 0.3s. After a couple of hours, it is too long again, about 3s.

    I am just using Autoptimizer plugin and just with HTML minification, css minification (not css inline) and js minification (not for all .js).

    I have a subdomain in pure HTML code without wordpress or cache plugins, and te TTFB is always OK, but my wordpress domains with Autoptimizer seems that something is happening.

    Any sugestions? Thanks.

    The page I need help with: [log in to see the link]

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  • Plugin Author Optimizing Matters

    (@optimizingmatters)

    Very hard to say @edgarpego, but here are some pointers on what you *could* do;

    1. run a multi-day test, where
    -> on day 1 you run the site with all AO options on and do a tests on webpagetest.org every 2h to monitor performance
    -> on day 2 you run the site with all AO JS & HTML optimization on and do a tests on webpagetest.org every 2h to monitor performance
    -> on day 3 you run the site with all AO CSS & HTML optimization on and do a tests on webpagetest.org every 2h to monitor performance
    -> on day 4 you run the site with all AO JS & CSS optimization on and (you guessed it) do a tests on webpagetest.org every 2h to monitor performance
    -> on day 5 you run the site with no AO options on and do a tests on webpagetest.org every 2h to monitor performance

    and then compare performance results to see if there are significant differences between these setups. based on those we should be able to identify which optimization specifically is slowing things down.

    2. you seem to be behind Varnish, but I don’t see x-cache HITS, ideally AO is combined with some sort of page caching.

    3. new relic is a great tool that can help in identifying performance bottlenecks. it’s not cheap, but there is a 14d free trial period. highly recommended!

    4. you could try Autoptimize 2.4 beta, which has significant improvements with regards to CSS optimization speed specifically (and actually lots of other new features, improvements & fixes as well)

    feel free to follow up on this here, I’d be happy to help where possible!

    frank

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