Untitled

import time
PT_bef = 0
PT_sum = 0

def PT_Before():
    global PT_bef
    if nuke.thisGroup()['clear'].value():
        nuke.memory("free")
        nukescripts.clearAllCaches()
    PT_bef = time.time()

def PT_After():
    global PT_bef
    global PT_sum
    tmp = time.time() - PT_bef
    PT_sum += tmp

def PT_Run():
    node = nuke.thisNode()

    if node.input(0) is not None:
        if node['clear'].value():
            nuke.memory("free")
            nukescripts.cache_clear('')

        #reset sum variable
        global PT_sum
        PT_sum = 0

        frame = nuke.frame()
        samples = node['samples'].value()

        sampleRange = []
        for i in range(int(samples)):
            sampleRange.append(frame)

        with node:
            writeNode = nuke.toNode('Write1')
            nuke.execute(writeNode, nuke.FrameRanges(sampleRange))

        average = round(PT_sum/samples, 4)

        #create result knob
        inputName = node.input(0).name()
        textstr = '          %s sec\t\t%s %s\t frame %s' % (str(average), str(int(samples)), 'samples' if samples > 1 else 'sample  ', frame)
        Knob = nuke.Text_Knob('result', '<b>' + inputName + ':</b>', textstr)
        node.addKnob( Knob )

    else:
        nuke.message('Node has no input!')

def PT_ClearResults():
    node = nuke.thisNode()
    for i in node.allKnobs():
        if i.name() == 'result':
            node.removeKnob(i)