Re: [naviserver-devel] Performance comparison of base64 encoders

[Bernhard v. W. <ber...@qc...>]

Thanks, that will be very useful especially for large files.

Regards
Bernhard

On 7 December 2014 at 13:01, Gustaf Neumann <ne...@wu...> wrote:

>  Dear friends,
>
> Maybe, someone finds this information useful:
>
> just now, i did a quick comparison of the various
> options for base64 codecs. It shows that NaviServer's
> built-in ns_base64encode  is very fast:
> it is up to a factor of 1.000 faster than the Tcl-only
> version of base64::encode, and even a factor of 10
> faster than base64::encode based on Trf (Trf 2.1.4).
> While a big difference relative to the plain Tcl version
> is expected, the improvement over the C-based Trf
> is remarkable.
>
> The results are measured with the latest version of
> NaviServer from bitbucket under Mac OS X 10.9.5
> Using ns_base64encode reduces the external
> dependencies and is by far the fastest version.
>
> all the best
> -g
>
>
> size=100
> 		tcllib:	      134.713824 microseconds
> 		tcllib+trf:     4.561536 microseconds
> 		ns:		0.541651 microseconds
>
> size=1000
> 		tcllib:	     1281.819696 microseconds
> 		tcllib+trf:    16.93683  microseconds
> 		ns:		1.517516 microseconds
> 			
> size=10000
> 		tcllib:	    12638.85578 microseconds
> 		tcllib+trf:   143.11120 microseconds		
> 		ns:	       11.08016 microseconds
>
> size=100000
> 		tcllib:	   127344.794553 microseconds
> 		tcllib+trf:  1423.021879 microseconds
> 		ns:	      113.504248 microseconds
>
> ------
>
> foreach i {10 100 1000 10000} {
>    set s [string repeat 0123456789 $i]
>    lappend _ size=[string length $s]
>    lappend _ tcllib:[time {base64::encode $s} 1000]
>    lappend _ ns:[time {ns_base64encode $s} 1000]
> }
> join $_ \n
>
>
>
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