In addition to the metrics it provides, Blackfire allows you to define custom metrics based on your application's logic.
These customized metrics could be the most powerful ones you could use in your performance tests.
Custom metrics are defined in your .blackfire.yaml file:
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metrics:
markdown_to_html:
# Short label for humans
label: 'Markdown to HTML'
# Longer description for humans
description: 'Metric for Markdown to HTML conversion'
matching_calls:
php:
-
callee: "=App\\Utils\\Markdown::toHtml"As for all metrics, custom metrics can be used when defining assertions.
Custom metrics target the execution of specific functions. You can list multiple
functions (callee) and even define a caller to target a specific sequence
of calls:
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metrics:
markdown_to_html:
matching_calls:
php:
-
caller: "=App\\Twig\\AppExtension::markdownToHtml"
callee: "=App\\Utils\\Markdown::toHtml"
-
callee: "=App\\Utils\\AlternativeMarkdown::toHtml"Callers and callee can be defined as regular expressions. You can also target all the classes implementing a class or an interface.
Explore the possibilities, such as capturing arguments and adding markers to your timelines