Defer or use the plugin

  • I am defering my javascript without using the plugin . WHich is better use it or not ? I mean in gtmetrix my page is 97% optimized my speed is nice 0.90seconds . Must i use your plugin to asyncronize the javascript or could cause more negative impact that good impact . I have seen that you have a defer option in it ? Which are the benefits ? What is better asynconous or defer the javascript ? Which is the very best configuration of the plugin in order to achieve the fastest possible speed ? thanks

Viewing 3 replies - 1 through 3 (of 3 total)
  • Plugin Author Optimizing Matters

    (@optimizingmatters)

    Hi again Frosinone ??

    So the difference between async & defer is that asynced JS is executed during HTML parsing and thus can still be (somewhat) render-blocking. deferred JS gets executed after HTML/ DOM parsing and is never render-blocking.

    And off course as you’re using Autoptimize all JS (except the excluded one) is already deferred, so AsyncJS might not be able to improve a lot, but AsyncJS integrates with AO so you could try and compare performance with and without? ??

    frank

    Thread Starter frosinone

    (@frosinone)

    thank you frank , so basically if i wish defer with AO i would not need this plugin . If i wish async i could use but is possible to break my site is not it ? is that waterfall created by the defer of the autoptimize ? I mean is not parallel ? so if I asyncronize i could improve it ?

    i attach the screenshot of my waterfall .

    https://ibb.co/my5sxo

    I mean the jump effect that appears in it

    • This reply was modified 6 years, 9 months ago by frosinone.
    Plugin Author Optimizing Matters

    (@optimizingmatters)

    best way is to test yourself and compare performance @frosinone, can’t really make any conclusions based on that waterfall ??

Viewing 3 replies - 1 through 3 (of 3 total)
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