Function clock_time

Returns the execution time of a previously stopped clock. Returns -1 if the clock has not been stopped.

Located at app/Kernel/Helpers/support_functions.php

Parameters summary
`string`	`$key = 'main'`	The clock you want the total time of.
`boolean\|false`	`$all = false`	Returns [end_time - start_time]. If true, it also returns start_time and end_time

Return value summary
`float`	The total time; format: seconds.microseconds