• Walter Bright (7/7) Sep 13 2019 Rainer and I collaborated on switching CTFE from using the heap to using...
• Paolo Invernizzi (6/13) Sep 14 2019 I really really appreciate that kind of work on the compiler!
• SashaGreat (6/14) Sep 14 2019 For a Win32 release
• Walter Bright (2/9) Sep 14 2019 It's not enabled with -lowmem, as that lets the GC deal with it.

Walter Bright <newshound2 digitalmars.com> writes:

Rainer and I collaborated on switching CTFE from using the heap to using a 
region allocator, which recycles the memory en masse at CTFE exit. Rainer did 
some benchmarking:

dmd 2.088: 1039 MB in 6.6 seconds
master: 909 MB in 5.0 seconds

https://github.com/dlang/dmd/pull/10396#issuecomment-531454363

and it's looking like a sweet win!

Paolo Invernizzi <paolo.invernizzi gmail.com> writes:

On Saturday, 14 September 2019 at 06:52:25 UTC, Walter Bright 
wrote:
 Rainer and I collaborated on switching CTFE from using the heap 
 to using a region allocator, which recycles the memory en masse 
 at CTFE exit. Rainer did some benchmarking:

 dmd 2.088: 1039 MB in 6.6 seconds
 master: 909 MB in 5.0 seconds

 https://github.com/dlang/dmd/pull/10396#issuecomment-531454363

 and it's looking like a sweet win!

I really really appreciate that kind of work on the compiler!

Kudos to both for the improvement!
Keep pushing on that way!

/Paolo

SashaGreat <s g.com> writes:

On Saturday, 14 September 2019 at 06:52:25 UTC, Walter Bright 
wrote:
 ... Rainer did some benchmarking:

 dmd 2.088: 1039 MB in 6.6 seconds
 master: 909 MB in 5.0 seconds

For a Win32 release

 and it's looking like a sweet win!

Another test showed:

 ... in a Linux x64 VM; using dmd 2.082.0 as host compiler (and 
 ENABLE_RELEASE), best of 3 runs:

e9840d3: 1,600 MB in 0:23.62, -lowmem: 419 MB in 0:43.57
master (bc93e5e): 1,462 MB in 0:22.02, -lowmem: 419 MB in 0:42.56

I think it needs much more improvement.

S.

Walter Bright <newshound2 digitalmars.com> writes:

On 9/14/2019 7:05 AM, SashaGreat wrote:
 ... in a Linux x64 VM; using dmd 2.082.0 as host compiler (and 
 ENABLE_RELEASE), best of 3 runs:

 
 e9840d3: 1,600 MB in 0:23.62, -lowmem: 419 MB in 0:43.57
 master (bc93e5e): 1,462 MB in 0:22.02, -lowmem: 419 MB in 0:42.56

 
 I think it needs much more improvement.

It's not enabled with -lowmem, as that lets the GC deal with it.