43 lines
2.8 KiB
Markdown
43 lines
2.8 KiB
Markdown
[<< previous](16-data-repository.md) | [next >>](18-caching.md)
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## Autoloading performance
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Although our application is still very small and you should not really experience any performance issues right now,
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there are still some things we can already consider and take a look at. If I check the network tab in my browser it takes
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about 90-400ms to show a simple rendered markdownpage, with is sort of ok but in my opinion way to long as we are not
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really doing anything and do not connect to any external services. Mostly we are just reading around 16 markdown files,
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a template, some config files here and there and parse some markdown. So that should not really take that long.
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The problem is, that we heavily rely on autoloading for all our class files, in the `src` folder. And there are also
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quite a lot of other files in composers `vendor` directory. To understand while this is becomming we should make
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ourselves familiar with how [autoloading in php](https://www.php.net/manual/en/language.oop5.autoload.php) works.
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The basic idea is, that every class that php encounters has to be loaded from somewhere in the filesystem, we could
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just require the files manually but that is tedious, unflexible and can often cause errors.
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The problem we are now facing is that the composer autoloader has some rules to determine from where in the filesystem
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a class definition might be placed, then the autoloader tries to locate a file by the namespace and classname and if it
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exists includes that file.
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If we only have a handfull of classes that does not take a lot of time, but as we are growing with our application this
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easily takes longer than necesery, but fortunately composer has some options to speed up the class loading.
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Take a few minutes to read the documentation about [composer autoloader optimization](https://getcomposer.org/doc/articles/autoloader-optimization.md)
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You can try all 3 levels of optimizations, but we are going to stick with the first one for now, so lets create an
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optimized classmap.
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`composer dump-autoload -o`
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After composer has finished you can start the devserver again with `composer serve` and take a look at the network tab
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in your browsers devtools.
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In my case the response time falls down to under an average of 30ms with some spikes in between, but all in all it looks really good.
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You can also try out the different optimization levels and see if you can spot any differences.
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Although the composer manual states not to use the optimtization in a dev environment I personally have not encountered
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any errors with the first level of optimizations, so we can use that level here. If you add the line from the documentation
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to your `composer.json` so that the autoloader gets optimized everytime we install new packages.
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[<< previous](16-data-repository.md) | [next >>](18-caching.md)
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