monkeyrunner - hot start measuring

hot_start.py

#! /usr/bin/env monkeyrunner

# hot start: not opening the app for the first time. still, previous processes are killed.

import time
import subprocess
import commands
import sys
import datetime
import re
import os

debug = 0
test_number = 20

from com.android.monkeyrunner import MonkeyRunner, MonkeyDevice

if debug: print "before connection"
device = MonkeyRunner.waitForConnection()
if debug: print "after connection"

package = 'your_package_name'
startActivity = 'your_start_activity'

# sets the name of the component to start
startComponent = package + '/' + startActivity

device.shell('am force-stop ' + package)

time.sleep(2)

test_counter = 0
times = []

while test_counter < test_number:
	# Flush logcat
	p = subprocess.call([ "adb", "logcat", "-c" ], shell=False, stdout=subprocess.PIPE)

	# Run the component
	if debug: print "starting activity"
	device.startActivity(component=startComponent)
	#p = subprocess.call([ "adb", "logcat", "-d", "ActivityManager:I", "*:S", ">", "mxm.log"], shell=False, stdout=subprocess.PIPE)
	time.sleep(3)
	os.system('adb logcat -d ActivityManager:I *:S > mxm.log')

	if debug: print "grepping logcat"
	f = open('app.log', 'r')
	for line in f:
		m = re.search(r'your_regex_goes_here', line)
		# e.g., re.search(r'Displayed\scom\.company\.app\/com\.company\.app\.MainActivity(.*)', line)

		if m:
			last_part = m.group(1)
			result = re.match(r'[\s\+:]*([0-9]{1})s([0-9]{3})ms', last_part)
			if not result:
				result = re.match(r'([0-9]{3})ms', last_part)
				if not result:
					continue

			seconds = 0
			milliseconds = 0
			if len(result.groups()) == 2:
				seconds = result.group(1)
				milliseconds = result.group(2)
			else:
				milliseconds = result.group(1)

			times.append(float(seconds + "." + milliseconds))
			print "(", test_counter, ")", "Startup elapsed time: ", seconds + "." + milliseconds
			break
			
	f.close()
	
	test_counter = test_counter + 1
	
	device.shell('am force-stop ' + package)

	time.sleep(2)

average = sum(times) / len(times)
print "Average: ", average