DOS批处理延时执行方案总结

偶尔会用到，今天就总结几个批处理延时执行命令的方案。

需求：延时5秒打开test.txt这个文件

方案1：ping命令 缺点:时间精度约为1秒，延时越久误差越大，不够精确

@echo off 
@ping 127.0.0.1 -n 6 >nul
start test.txt
           

方案2-(1)：VBScript和start /wait命令 缺点：附带生成临时文件 有点：时间精度约为0.001秒，精度高

@echo off
echo wscript.sleep 5000><span style="color: rgb(51, 51, 51); font-family: 宋体; font-size: 14px; line-height: 28px;">%tmp%\</span>sleep.vbs
start /wait sleep.vbs
start test.txt 
del /f /s /q <span style="color: rgb(51, 51, 51); font-family: 宋体; font-size: 14px; line-height: 28px;">%tmp%\</span>sleep.vbs
           

方案2-(2)：VBScript

@echo off 
echo wscript.sleep 5000><span style="color: rgb(51, 51, 51); font-family: 宋体; font-size: 14px; line-height: 28px;">%tmp%\</span>sleep.vbs
@cscript sleep.vbs >nul
start test.txt 
del /f /s /q <span style="color: rgb(51, 51, 51); font-family: 宋体; font-size: 14px; line-height: 28px;">%tmp%\</span>sleep.vbs
           

方案3：choice命令 优点：时间精确，CPU占用低。最佳选择 

@echo off 
choice /t 5 /d y /n >nul
start test.txt
           

方案4：call命令 缺点:准确度受CPU频率影响很大，不够精确，占用内存较多

@echo off
:loop
    echo %time%
    call :delay 1000
    echo %time%
goto loop
:delay
    set /a num=num + 1
    if %num% geq %1 (set num=) && goto :eof
rem    for /l %%i in (1,1,%1) do echo. >nul
goto :eof
start test.txt
           

方案5：msg命令 缺点:内存占用非常大，有窗口弹出

@echo off
msg %username% /time:5000 /w "正在延时，点确定可以取消延时!"
start test.txt