4 ms·

scala interpreter/REPL is starting up in about 0.5 seconds now compared to 7-8 seconds with 2.9.0.1 on my system using Sun JDK 64-bit. System scripting in Scal

by bodski 15y ago

scala interpreter/REPL is starting up in about 0.5 seconds now compared to 7-8 seconds with 2.9.0.1 on my system using Sun JDK 64-bit. System scripting in Scala suddenly got a lot more appealing :-)

ori_b 15y ago
That's still a pretty massively long time compared to, say, Ocaml or Haskell. (0.01 seconds for hello world, for both of them)
jhonnycano 15y ago
It's still appeals too long for me.
technomancy 15y ago
Hang on--that's 0.5s for server (64-bit) hotspot? That's astonishing. Any details on how they were able to achieve it?
- bodski 15y ago
  Aye, 64-bit hotspot with implicit -server switch, but going on your astonishment I took a look and it seems the 0.5s time is only achieved with fsc running from previous runs of the REPL. So from cold, i.e. no fsc running it takes about 3 seconds. 2.9.0-1 was taking 7-8 seconds to get the REPL prompt regardless of whether fsc was running already, so this is still like night and day for me :-) Amongst other things it looks like Paul Phillips (a.k.a extempore) has done a lot of optimisation work. This looks like a pretty important one: https://codereview.scala-lang.org/fisheye/changelog/scala-svn?cs=24909 https://codereview.scala-lang.org/fisheye/changelog/scala-sv...
  - technomancy 15y ago
    Oh, ok, so fsc is comparable to just connecting to a nailgun daemon, right? I don't actually know Scala; is there a tl;dr for that link?
    - gtani 15y ago
      (I couldn't find a good summation, maybe there are more substantive m-list threads in internals: http://groups.google.com/group/scala-internals/browse_frm/thread/83e613d5262b036d/ http://groups.google.com/group/scala-internals/browse_frm/th... http://groups.google.com/group/scala-internals/browse_frm/thread/3e78dcbd9f5e63a5/ http://groups.google.com/group/scala-internals/browse_frm/th... http://groups.google.com/group/scala-internals/browse_thread/thread/42eb39852eb32777/ http://groups.google.com/group/scala-internals/browse_thread...

by bodski 15y ago

scala interpreter/REPL is starting up in about 0.5 seconds now compared to 7-8 seconds with 2.9.0.1 on my system using Sun JDK 64-bit. System scripting in Scala suddenly got a lot more appealing :-)

ori_b 15y ago

That's still a pretty massively long time compared to, say, Ocaml or Haskell. (0.01 seconds for hello world, for both of them)

jhonnycano 15y ago

It's still appeals too long for me.

technomancy 15y ago

Hang on--that's 0.5s for server (64-bit) hotspot? That's astonishing. Any details on how they were able to achieve it?

bodski 15y ago
Aye, 64-bit hotspot with implicit -server switch, but going on your astonishment I took a look and it seems the 0.5s time is only achieved with fsc running from previous runs of the REPL. So from cold, i.e. no fsc running it takes about 3 seconds. 2.9.0-1 was taking 7-8 seconds to get the REPL prompt regardless of whether fsc was running already, so this is still like night and day for me :-) Amongst other things it looks like Paul Phillips (a.k.a extempore) has done a lot of optimisation work. This looks like a pretty important one: https://codereview.scala-lang.org/fisheye/changelog/scala-svn?cs=24909 https://codereview.scala-lang.org/fisheye/changelog/scala-sv...
- technomancy 15y ago
  Oh, ok, so fsc is comparable to just connecting to a nailgun daemon, right? I don't actually know Scala; is there a tl;dr for that link?
  - gtani 15y ago
    (I couldn't find a good summation, maybe there are more substantive m-list threads in internals: http://groups.google.com/group/scala-internals/browse_frm/thread/83e613d5262b036d/ http://groups.google.com/group/scala-internals/browse_frm/th... http://groups.google.com/group/scala-internals/browse_frm/thread/3e78dcbd9f5e63a5/ http://groups.google.com/group/scala-internals/browse_frm/th... http://groups.google.com/group/scala-internals/browse_thread/thread/42eb39852eb32777/ http://groups.google.com/group/scala-internals/browse_thread...