The Wall Clock Time, or Wall Time, for a function call is the measure of the real time it took for PHP to execute its code: the difference between the time at which PHP entered the function and the time at which PHP left the function
Network activity includes calls to databases like MySQL, PostreSQL, or MongoDB; HTTP calls to web services and APIs; calls to cache systems like Redis and Memcached; communications with services like queues, email daemons, remote filesystems; etc.
blackfire run php palindrome.php Blackfire Run completed Graph URL https://blackfire.io/profiles/b9a7eafa-cd2f-49f9-b955-5667ac76fa33/graph Wall Time 2.59ms CPU Time 1.14ms I/O Time 1.45ms Memory 18.8KB Network n/a SQL n/a
Writing assertions on the main profile costs is as easy as adding a valid dimension name to the main. Prefix: ● count ● wall_time ● cpu_time ● memory ● peak_memory ● io ● network_in ● network_out