[fpc-devel] FPC trunk compiler slower than 3.0.4

[Martin]

On 18/05/2018 17:32, Ondrej Pokorny wrote:
> Hello,
>
> I observe that FPC trunk compiler is about 65-70% (factor 1.65-1.7) 
> slower than FPC 3.0.4 compiler.
>
> E.g. building Lazarus IDE takes on my machine:
> 1:00 with FPC 3.0.4
> 1:40 with FPC trunk
>
> Do you observe the same? Any hints why? Is anybody worried about the 
> speed? Is anybody working on the speed issues? The compile time 
> increase is huge.
>
> I seem to have the same fpc.cfg and FPC/Lazarus build options.

Building the IDE with custom opts, include -gw ...

3.0.4  60 seconds
trunk 67 seconds   3.1.1 [2018/04/16] not sure what revision
trunk 73 seconds   revision 39024 (18 May 2018)

All builds were run twice, and the 2nd run taken. So OS file caching 
from previous builds should be similar for all of them.