I think the point the OP is making is that when he runs the command from the
Linux command line it completes in 2 sec - so the Wine startup time should not
be the issue.
-----Original Message-----
>From: Ian Lance Taylor <i...@golang.org>
>Sent: Nov 19, 2019 9:15 AM
>To: miha.vrhov...@gmail.com
>Cc: golang-nuts <golang-nuts@googlegroups.com>
>Subject: Re: [go-nuts] ultra slow os.Exec
>
>On Tue, Nov 19, 2019 at 6:52 AM <miha.vrhov...@gmail.com> wrote:
>>
>> I'm running windows cli exe on linux via wine using os.Exec command.. this
>> takes 28s to complete.
>> If I run the same command via linux cli it takes 2s to complete, if I run
>> the same command via php's exec it also takes about 2 seconds to complete.
>>
>> == linux cli ==
>>
>> time WINEDEBUG=err-all,fixme-all WINEARCH=win32 /opt/wine-staging/bin/wine
>> cmd.exe /c help
>> ....
>> real 0m1,366s
>> user 0m0,002s
>> sys 0m0,225s
>>
>> == php ==
>> cat t.php
>> <?php
>> $out=array();
>>
>> exec('WINEDEBUG=err-all,fixme-all WINEARCH=win32 /opt/wine-staging/bin/wine
>> cmd.exe /c help', $out);
>>
>> var_dump($out);
>>
>> .....
>>
>> real 0m1,427s
>> user 0m0,035s
>> sys 0m0,216s
>>
>>
>> ==go exec==
>>
>> func main() {
>> now := time.Now()
>> ctx, cancel := context.WithTimeout(context.Background(), 120*time.Second)
>> defer cancel()
>> cmd := exec.CommandContext(ctx, "/opt/wine-staging/bin/wine", "cmd",
>> "/c", "help")
>> cmd.Env = []string{"WINEDEBUG=err-all,fixme-all", "WINEARCH=win32"}
>> output, err := cmd.CombinedOutput()
>> if err != nil {
>> fmt.Println(err)
>> }
>> fmt.Println(string(output))
>> fmt.Println(time.Now().Sub(now))
>> }
>>
>> time bin/osexec
>>
>> real 0m39,915s
>> user 0m17,062s
>> sys 0m0,195s
>>
>>
>> * I have tried to set stdin and std out directly to the one from os (no
>> difference)
>> * I have replaced cmd.CombinedOutput with cmd.Run() (no difference)
>>
>> go version
>> go version go1.13.3 linux/amd64
>> I'm totally clueless on what's going on.
>
>How long does it take to just run the wine command from the shell?
>
>My first guess would certainly be that the problem is in wine, not in
>Go's os/exec package. Starting up a Windows emulator has to take a
>certain amount of time.
>
>Ian
>
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