Loop Recognition Benchmarks in C++, Java, Go, Scala (2011) [pdf](days2011.scala-lang.org)

43 pointsby saltcookie12 anni fa16 comments

days2011.scala-lang.org

Loop Recognition Benchmarks in C++, Java, Go, Scala (2011) [pdf]

https://days2011.scala-lang.org/sites/days2011/files/ws3-1-Hundt.pdf

6 comments

f2f12 anni fa

the go side of that paper should be accompanied by this link, always:

http://blog.golang.org/profiling-go-programs

> Go and Scala have powerful type inference, making explicit type declarations very rare. In C++ and Java everything needs to be declared explicitly.

I guess they forgot about C++11's auto?

masklinn12 anni fa

And "powerful type inference"? For Go? Doesn't it just do local implicit typing using the RHS type straight as the LHS's?

realrocker12 anni fa

This is really old. C++, Java are mature languages. Scala hit 2.11 in March 2014, while Go version 1 was released in March 2012 and currently is at 1.3. Versions don't tell the whole story, but they do matter.

claudius12 anni fa

On the other hand, this:

  // Step d:
  IntList::iterator back_pred_iter = back_preds[w].begin();
  IntList::iterator back_pred_end = back_preds[w].end();
  for (; back_pred_iter != back_pred_end; back_pred_iter++) {
    int v = *back_pred_iter;
    …

can now be written

  for (auto v : back_preds[w]) {
    …                                ,

hence you could argue that while C++ is certainly “mature” in a sense, it is far from converged.

igouy12 anni fa

Discussion from 2011

https://news.ycombinator.com/item?id=2615096

pella12 anni fa

benchmark - now 2014 : http://www.techempower.com/benchmarks/

broodbucket12 anni fa

While this tells a somewhat similar story, comparing web frameworks to the languages themselves is apples to oranges.

kasey_junk12 anni fa

Needs a 2011 tag.

dang12 anni fa

Yes, and the title was rewritten as well [1].

Submitters: please use an article's title unless it is linkbait or misleading [2].

1. Submitted title was "Google Publishes C++, Go, Java and Scala Performance Benchmarks"

2. https://news.ycombinator.com/newsguidelines.html

barrkel12 anni fa

IMO the title is misleading, and the submitted title is better. Though "Google Researcher Publishes..." would more accurately state its provenance.

The algorithm encoded in the benchmark is loop recognition, but the purpose of the paper is to benchmark the languages, not to find loops.

dang12 anni fa

Ok, thanks. We added "Benchmarks" to the title.

saltcookie12 anni fa

http://readwrite.com/2011/06/06/cpp-go-java-scala-performanc...

this is the real artical, which just points to the pdf

saltcookie12 anni fa

That is true, i don't understand y some one changed the tittle

gtani12 anni fa

and this phrase on page 7 highlighted

    The benchmarking itself was done in a simple and 
    fairly un-scientific fashion.

    ... older Pentium IV workstation. Run-times were
    measured using wall-clock time.

but still a good read about tweaking c++ (I think at the time, clang and gcc were still implementing the C++11 standard features).

Also i remember long HN threads about this in mid 2011 but i can't find them, here'a a later discussion https://news.ycombinator.com/item?id=4539668

pella12 anni fa

yes - 2011

http://research.google.com/pubs/pub37122.html

Venue : Proceedings of Scala Days 2011

Publication Year: 2011