Question

想知道python的性能。我生成了以下代码来检查raspberry-pi 3的性能.python版本是2.7.9。

pslibs / psDebug.py文件

import sys
import time
from datetime import datetime

class CliColor :
    YELLOW ='\x1b[00;033;033m'
    GREEN = '\x1b[00;032;032m'
    RED = '\x1b[00;031;031m'
    NONE = '\x1b[00m'

class PSDebug :
    @staticmethod
    def debug(msg, color=CliColor.NONE) :
        if color == CliColor.NONE :
            print >> sys.stderr, "%s @ %s" % (datetime.now().strftime("%H:%M:%S.%f"), msg)
        else :
            print >> sys.stderr, "%s%s @ %s%s" % (color, datetime.now().strftime("%H:%M:%S.%f"), msg, CliColor.NONE)

def DBG(arg, color=CliColor.NONE) :
    PSDebug.debug(arg, color)
    sys.stderr.flush()

test.py文件

#!/usr/bin/env python

import sys
from libps.psDebug import DBG

count = 0
while count <= 10000 :
    DBG('Count : %d' % count)
    count += 1

第一个，在终端中执行'time ./test.py'。它工作正常，并生成了libps / psDebug.pyc。

第二个，删除了libps / psDebug.py并使用libps / psDebug.pyc执行'time ./test.py'。

第三，恢复libps / psDebug.py。运行'pyinstaller test.py'并执行'time ./test'。

每个结果如下。

real    0m11.946s
user    0m10.130s
sys 0m1.550s

real    0m26.482s
user    0m24.340s
sys 0m1.820s

real    0m20.362s
user    0m18.820s
sys 0m1.010s

我的观点中的预测似乎反向更快。但脚本.py文件更快。当我使用strace实用程序进行调试时，唯一不同的是“统计系统调用错误”。

首先，'时间./test.py'

stat64("/work/temp/libps/psDebug.py", {st_mode=S_IFREG|0644, st_size=936, ...}) = 0
stat64("/work/temp/libps/psDebug.py", {st_mode=S_IFREG|0644, st_size=936, ...}) = 0
stat64("/work/temp/libps/psDebug.py", {st_mode=S_IFREG|0644, st_size=936, ...}) = 0
stat64("/work/temp/libps/psDebug.py", {st_mode=S_IFREG|0644, st_size=936, ...}) = 0
stat64("./test.py", {st_mode=S_IFREG|0755, st_size=185, ...}) = 0
stat64("./test.py", {st_mode=S_IFREG|0755, st_size=185, ...}) = 0
getcwd("/work/temp", 1024)              = 11
stat64("./test.py", {st_mode=S_IFREG|0755, st_size=185, ...}) = 0
stat64("./test.py", {st_mode=S_IFREG|0755, st_size=185, ...}) = 0
getcwd("/work/temp", 1024)              = 11
gettimeofday({1463756954, 935083}, NULL) = 0
stat64("/etc/localtime", {st_mode=S_IFREG|0644, st_size=557, ...}) = 0
write(2, "00:09:14.935083 @ Count : 9999", 30) = 30
write(2, "\n", 1)                       = 1

其次，'时间./test.py'

stat64("/work/temp/libps/psDebug.py", 0x7e979a40) = -1 ENOENT (No such file or directory)
stat64("/work/temp/libps/psDebug.py", 0x7e979980) = -1 ENOENT (No such file or directory)
stat64("/work/temp/libps/psDebug.py", 0x7e979a40) = -1 ENOENT (No such file or directory)
stat64("/work/temp/libps/psDebug.py", 0x7e979980) = -1 ENOENT (No such file or directory)
stat64("./test.py", {st_mode=S_IFREG|0755, st_size=185, ...}) = 0
stat64("./test.py", {st_mode=S_IFREG|0755, st_size=185, ...}) = 0
getcwd("/work/temp", 1024)              = 11
stat64("./test.py", {st_mode=S_IFREG|0755, st_size=185, ...}) = 0
stat64("./test.py", {st_mode=S_IFREG|0755, st_size=185, ...}) = 0
getcwd("/work/temp", 1024)              = 11
gettimeofday({1463756850, 285897}, NULL) = 0
stat64("/etc/localtime", {st_mode=S_IFREG|0644, st_size=557, ...}) = 0
write(2, "00:07:30.285897 @ Count : 9999", 30) = 30
write(2, "\n", 1)                       = 1

第三，'时间./test'

stat64("libps/psDebug.py", 0x7eac9a10)  = -1 ENOENT (No such file or  directory)
getcwd("/work/temp/dist/test", 1024)    = 21
stat64("libps/psDebug.py", 0x7eac9928)  = -1 ENOENT (No such file or directory)
getcwd("/work/temp/dist/test", 1024)    = 21
getcwd("/work/temp/dist/test", 1024)    = 21
stat64("libps/psDebug.py", 0x7eac9858)  = -1 ENOENT (No such file or directory)
stat64("libps/psDebug.py", 0x7eac9a10)  = -1 ENOENT (No such file or directory)
getcwd("/work/temp/dist/test", 1024)    = 21
stat64("libps/psDebug.py", 0x7eac9928)  = -1 ENOENT (No such file or directory)
getcwd("/work/temp/dist/test", 1024)    = 21
getcwd("/work/temp/dist/test", 1024)    = 21
stat64("libps/psDebug.py", 0x7eac9858)  = -1 ENOENT (No such file or directory)
stat64("test.py", 0x7eac9a10)           = -1 ENOENT (No such file or directory)
getcwd("/work/temp/dist/test", 1024)    = 21
stat64("test.py", 0x7eac9928)           = -1 ENOENT (No such file or directory)
getcwd("/work/temp/dist/test", 1024)    = 21
stat64("test.py", 0x7eac9cb0)           = -1 ENOENT (No such file or directory)
getcwd("/work/temp/dist/test", 1024)    = 21
stat64("test.py", 0x7eac9bc8)           = -1 ENOENT (No such file or directory)
getcwd("/work/temp/dist/test", 1024)    = 21
gettimeofday({1463756115, 1765}, NULL)  = 0
stat64("/etc/localtime", {st_mode=S_IFREG|0644, st_size=557, ...}) = 0
write(2, "23:55:15.001765 @ Count : 6912", 30) = 30
write(2, "\n", 1)                       = 1

请建议如何改善第二种和第三种方法的性能。

性能不同.py，.pyc和pyinstaller？

0 个答案: