parallel copy directory, faster than robocopy

[jackreacher]

On Tuesday, 6 March 2012 at 00:29:01 UTC, Jay Norwood wrote:
> So here is the output of a batch file I just ran on the ssd 
> drive for the 1.5GB copy.  Robocopy displays that it took 
> around 14 secs, while the release build of the D commandline 
> cpd utility took around 12 secs.  That's a pretty consistent 
> result on the ssd drive, which are more sensitive to cpu pr.
>
> 06:12 PM
>
> H:\xx8>robocopy /E /NDL /NFL /NC /NS /MT:8 xx8c xx8ca
>
> -------------------------------------------------------------------------------
>    ROBOCOPY     ::     Robust File Copy for Windows
> -------------------------------------------------------------------------------
>
>   Started : Mon Mar 05 18:12:33 2012
>
>    Source : H:\xx8\xx8c\
>      Dest : H:\xx8\xx8ca\
>
>     Files : *.*
>
>   Options : *.* /NS /NC /NDL /NFL /S /E /COPY:DAT /MT:8 
> /R:1000000 /W:30
>
> ------------------------------------------------------------------------------
> 100%
>
> ------------------------------------------------------------------------------
>
>                Total    Copied   Skipped  Mismatch    FAILED    
> Extras
>     Dirs :      2627      2626         1         0         0
>    0
>    Files :     36969     36969         0         0         0
>    0
>    Bytes :   1.502 g   1.502 g         0         0         0
>    0
>    Times :   0:02:05   0:00:12                       0:00:00   
> 0:00:01
>
>    Ended : Mon Mar 05 18:12:47 2012
>
> H:\xx8>time /T
> 06:12 PM
>
> H:\xx8>rmd xx8ca\*
> removing: xx8ca\Cross_Tools
> removing: xx8ca\eclipse
> removing: xx8ca\gnu
> removing: xx8ca\PA
> finished! time:17889 ms
>
> H:\xx8>time /T
> 06:13 PM
>
> H:\xx8>cpd xx8c\* xx8ca
> copying: xx8c\Cross_Tools
> copying: xx8c\eclipse
> copying: xx8c\gnu
> copying: xx8c\PA
> finished! time: 11681 ms
>
> H:\xx8>time /T
> 06:13 PM
>
> btw, I just ran robocopy with /mt:1, and it took around 42 
> seconds on the same drive, which is about what I see with the 
> standard windows copy, including the gui copy.  So, at least 
> for these ssd drives the parallel processing results in 
> worthwhile speed-ups.
>
> Started : Mon Mar 05 18:24:31 2012
> Ended : Mon Mar 05 18:25:13 2012