Perf.start

Start a Perf task, with an optional detail String.

Results are displayed in the Perf Panel.

fun createThumb(imageFileName) {

    Perf.start('createThumbnail', 'file: ' ~ imageFileName)

    // ... modify pixels ...

    Perf.stop()
}

Nested Tasks 

Nested tasks are possible, like this:

Perf.start('outerTask')

outerTask()

if $doSubTask {
    Perf.start('innerTask')
    innerTask()
    Perf.stop()
}

Perf.stop()