Pixel Time Trials - for testing write speeds in CircuitPython

pixeltimetrial-code.py

from board import *
import time
import urandom
import neopixel

pininuse = A0  #change for your board pin
strandsize = 144
stepsize = 10
startingpixel = 5
color = (30,0,0)
trialcount = 5

def timedrun(trials,pixels,color,autow):
    # combined will be divided by trial total, set once before the trials
    setcombined = 0
    writecombined = 0
    #set low to high value, so it'll be replaced
    setlow = 60
    writelow = 60
    #set high to low value, so it'll be replaced
    sethigh = 0
    writehigh = 0

    for trial in range (0, trials): # # of trials, take high, low, and average
        with neopixel.NeoPixel(pininuse, pixels, 3, 1, autow) as np: # change to match pin and pixel count
            #np.auto_write = autow
            starttime = time.monotonic()
            for i in range(0, pixels):
                np[i] = color
            writestop = time.monotonic()
            np.show()
            showstop = time.monotonic()
        #collect data on run
        settime = writestop - starttime
        setcombined += settime
        if settime > sethigh:
            sethigh = settime
        if settime < setlow:
            setlow = settime

        writetime = showstop - writestop
        writecombined += writetime
        if writetime > writehigh:
            writehigh = writetime
        if writetime < writelow:
            writelow = writetime

    print (trials, color, autow, pixels, setlow, setcombined/trials, sethigh, writelow, writecombined/trials, writehigh)

def pixeltimetrials():

    print ("trials", "color", "autowrite", "#pixels", "setlow", "setavg", "sethigh", "writelow", "writeavg", "writehigh")

    for size in range(startingpixel, strandsize, stepsize):  #144 neopixel strand tested, 10-140
        timedrun(trialcount, size, color, True)  #auto_write True
        timedrun(trialcount, size, color, False) #auto_write False
    print ("Trial run complete")

pixeltimetrials()