DMD producing huge binaries

ZombineDev via Digitalmars-d digitalmars-d at puremagic.com
Fri May 20 02:48:15 PDT 2016


On Thursday, 19 May 2016 at 22:16:03 UTC, Walter Bright wrote:
> On 5/19/2016 6:45 AM, Andrei Alexandrescu wrote:
>> I very much advocate slapping a 64-long random string for all 
>> Voldermort returns
>> and calling it a day. I bet Liran's code will get a lot 
>> quicker to build and
>> smaller to boot.
>
> Let's see how far we get with compression first.
>
>   https://github.com/dlang/dmd/pull/5793
>
> Using 64 character random strings will make symbolic debugging 
> unpleasant.

Unfortunately, the PR doesn't cure the root cause, but only 
provides linear 45-55% improvement, which doesn't scale with the 
exponential growth of the symbol size:


     case        time to compile     du -h   strings file | wc -c
NG-case before      0m19.708s       339M        338.23M
NG-case  after      0m27.006s       218M        209.35M
OK-case before      0m1.466s         16M         15.33M
OK-case  after      0m1.856s         11M          9.28M

For more info on the measurements:
https://github.com/dlang/dmd/pull/5793#issuecomment-220550682




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