Blender Tile Size Performance Test Script

tiletest.py

import bpy
import time
from datetime import datetime
from bpy.app import handlers

print("================")

global DEVICES
global RESOLUTIONS
global CLOCK
global DURATION
global RESNOW
global DEVNOW
global LOGLINE
global LOGFILE

LOGPATH = 'C:/Cache/log.csv'
DEVICES  = ["CPU", "GPU"]
#RESOLUTIONS = [[8,8],[16,16],[32,32],[48,48],[64,64],[80,80],[128,128],[256,256],[320,320],[480,480],[512,512],[640,640],[320,270],[160,135],[480,405],[1920,1080],[1280,720],[960,540]]
#RESOLUTIONS = [[320,270],[160,135]]
RESOLUTIONS = [[16,16],[32,32],[48,48],[64,64],[80,80],[128,128],[256,256],[320,320],[480,480],[512,512],[640,640],[320,270],[160,135],[480,405],[1920,1080],[1280,720],[960,540]]
DEVNOW = 0
RESNOW = 0
RESMAX = len(RESOLUTIONS) - 1

def start_timer(scene):
    global CLOCK
    print("RENDER STARTING", bpy.context.scene.cycles.device, bpy.context.scene.render.tile_x, bpy.context.scene.render.tile_y)
    CLOCK = datetime.now()

def elapsed(dummy):
    global DURATION
    global CLOCK
    global LOGLINE
    global RESNOW
    global DEVNOW
    DURATION = datetime.now() - CLOCK
    LOGLINE = DEVICES[DEVNOW] + ", " + str(RESOLUTIONS[RESNOW][0]) + ", " + str(RESOLUTIONS[RESNOW][1])
    LOGLINE = LOGLINE + ", " + str(DURATION) + "\n"
    print(LOGLINE)
    with open(LOGPATH, "a+") as logfile:
        logfile.write(LOGLINE)

    RESNOW = RESNOW + DEVNOW
    DEVNOW = abs(DEVNOW - 1)
    
    if RESNOW <= RESMAX:
        render_next()
    else:
        print("COMPLETE")

def render_next():
    bpy.context.scene.cycles.device = DEVICES[DEVNOW]
    bpy.context.scene.render.tile_x = RESOLUTIONS[RESNOW][0]
    bpy.context.scene.render.tile_y = RESOLUTIONS[RESNOW][1]
    
    print(bpy.context.scene.cycles.device, bpy.context.scene.render.tile_x, bpy.context.scene.render.tile_y)
    
    bpy.ops.render.render()

handlers.render_pre.clear()
handlers.render_complete.clear()

handlers.render_pre.append(start_timer)
handlers.render_complete.append(elapsed)

render_next()