Ding ding ding! We have a winner! Thank you so much. That made a huge
difference. It is now running ~20 seconds.
The key is being in the same directory.
On Monday, December 4, 2017 at 2:17:03 PM UTC-5, Patrick Smith wrote:
>
> Does it make a difference if you first change directory to
> /var/spool/directory, then glob * and unlink the resulting filenames,
> without prepending the directory?
>
> On Mon, Dec 4, 2017 at 11:05 AM, Gabriel Forster <gabejes...@gmail.com
> <javascript:>> wrote:
>
>> Readdirnames wasn't much better. Now using globbing and syscall.Unlink
>> which take ~1minute 30seconds. It is much better, but still a long way from
>> perl's sub-20 seconds.
>>
>> package main
>>
>> import (
>> "fmt"
>> "path/filepath"
>> "syscall"
>> )
>>
>> func main() {
>>
>> upperDirPattern := "/var/spool/directory/*"
>> matches, err := filepath.Glob(upperDirPattern)
>>
>> if err != nil {
>> fmt.Println(err)
>> }
>>
>> for _, file := range matches {
>> syscall.Unlink(file)
>> }
>> }
>>
>>
>>
>> On Monday, December 4, 2017 at 12:50:54 PM UTC-5, Gabriel Forster wrote:
>>>
>>> What takes 18 seconds in a perl command:
>>> perl -e 'for(<*>){((stat)[9]<(unlink))}'
>>>
>>> is taking almost 8 minutes with the following code. Any ideas how I can
>>> speed this up?
>>>
>>> dir, err := os.Open("/var/spool/directory")
>>> if err != nil {
>>> fmt.Fprintf(w, "failed - " + err.Error())
>>> return
>>> }
>>> defer dir.Close()
>>>
>>>
>>> files, err := dir.Readdir(-1)
>>> if err != nil {
>>> fmt.Fprintf(w, "failed - " + err.Error())
>>> return
>>> }
>>>
>>> for _, file := range files {
>>> if file.Name() == "." || file.Name() == ".." {
>>> continue
>>> }
>>>
>>> os.Remove("/var/spool/directory/" + file.Name())
>>> }
>>>
>>>
>>> fmt.Fprintf(w, "success")
>>>
>>>
>>> --
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>
>
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