DMD backend quality (Was: Re: DIP 1031--Deprecate Brace-Style Struct Initializers--Community Review Round 1 Discussion)

[H. S. Teoh]

On Tue, Feb 18, 2020 at 10:14:54PM +0000, kinke via Digitalmars-d wrote:
> On Tuesday, 18 February 2020 at 21:26:14 UTC, H. S. Teoh wrote:
> > With `dmd -O -inline`, a typical run is about 25-26 seconds.  With
> > `ldmd2 -O3`, a typical run is about 16-17 seconds.  We're looking at
> > a ~30% increase in performance here
> 
> Take care with such numbers - this sounds more like a 50% increase in
> performance. A speed-up by 4 (300% performance *increase*) results in
> 1/4th of the runtime, i.e., a runtime *decrease* by 75%.

Even better then. :-D


T

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