Andrei's Google Talk

[Leandro Lucarella]

Andrei Alexandrescu, el  3 de agosto a las 19:48 me escribiste:
> Leandro Lucarella wrote:
> >Walter Bright, el  3 de agosto a las 15:08 me escribiste:
> >>bearophile wrote:
> >>>At 14.42: You compare the performance of a D compiler with the performance of
> >>>a C++ compiler. But Delphi compiler was/is very fast (and probably the
> >>>FreePascal compile too), I have never "waited" for my Delphi (ObjectPascal)
> >>>code to compile. I think on average it takes only two thousand clock ticks to
> >>>compile one line of ObjectPascal code. It sounds a lot, but it means that
> >>>with a modern single-core CPU you can produce your binary file from a one
> >>>million ObjectPascal lines long program in less than two seconds.
> >>>ObjectPascal type system looks a bit simpler than D one (despite it has OOP,
> >>>generics, modules, inline asm, dynamic strings, records, all basic D types,
> >>>etc), so this isn't a fully apple-to-apple comparison.
> >>
> >>Some context is in order. The talk was given at Google and aimed at
> >>what would be interesting to Googlers. Google uses C++ extensively,
> >>and Rob Pike (of Go) listed as a motivator for Go the compile speed
> >>problems with C++. Rob made a point of how fast Go compiled code,
> >>and Go's compile speed has been praised a lot on Reddit as well.
> >>
> >>Andrei put together a benchmark that shows that D compiles 4 times faster than Go.
> >
> >I was surprised by that, can you publish what the benchmark was, and
> >what compilers were used? I tried Go when it came out and it felt faster
> >than D to compile (which is reasonable because is a much simpler
> >language).
> 
> I tested on two laptops (Ubuntu and Mac OSX). I compiled the two
> languages' standard libraries by using the provided makefiles, after
> touching all .go and all .d files involved. Then I divided the
> compilation times by the line counts of *.go/*.d files as wc has
> them and compared the results.
> 
> On OSX dmd was 4.3 times faster. On Ubuntu, the ratio was 4.45.

Seems like a very fair benchmark, I'm really surprised. Which Go
compiler did you tried, gccgo or gc (6g/8g)? IIRC gccgo is much slower
than gc.

> I had an online demo prepared for the talk, but I decided to not use it.

It would be a good selling point (is not the same hearing than seeing :).

-- 
Leandro Lucarella (AKA luca)                     http://llucax.com.ar/
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