[dmd-internals] [D-Programming-Language/dmd] 2f7ce3: add gc for Windows dmd

[Walter Bright]

I've gotten similar results. It's worse than I'd thought it would be. The 
addition of the gc substantially slows things down. Granted, the gc could be 
tuned, but this is a very inauspicious start.

Of course, the test suite is all small programs. How a large one behaved would 
be interesting.

Fortunately, the gc can be swapped in and out with a commenting/uncommenting 2 
lines in win32.mak.

On 9/24/2011 2:10 PM, Brad Roberts wrote:
> Looks like the execution time for dmd and phobos have increased fairly
> substantially since the gc was checked in.
>
>    http://d.puremagic.com/test-results/platform-history.ghtml?os=Win_32
>    http://d.puremagic.com/test-results/platform-history.ghtml?os=Linux_32
>
> The linux link is just for comparison to show that no increase has
> occurred there.  On windows the phobos test time has increased from
> approx 8 minutes to approx 10 minutes, or 25%.  The dmd test has
> increased from approx 27 minutes (much more variation and I didn't
> compute an average or std dev) to approx 39 minutes (with only one
> completed data point so far, so, well, grain of salt), almost doubling.
>
> A few more runs will help show the averages better, but still worth
> being concerned about.  That's a significant performance hit to the
> compiler.