Scala version 2.10.0-M6 REPL wrap mode

[Ramesh Mandaleeka]

Hi,

In the latest release, Scala version 2.10.0-M6, I couldn't find the :wrap option in the power mode. I saw the functionality on Scala 2.9.2 release. Can any one confirm

1/ If this feature is removed or not.
2/ If removed what is the alternative to achieve this functionality. I used to benchmark using scala.testing.Benchmark using :wrap

Regards,
Ramesh

[Jason Zaugg]

Yes, it was removed; the REPL shed a few pounds. You'll have to
explicitly call a timing wrapper function now, along these lines:

scala> def time[A](a: => A) = { def now = System.currentTimeMillis; val start
now; val result = a; val end = now; println(end - start); result }
time: [A](a: => A)A

scala> time(for (i <- 1 to 1000000) math.log(1))
27

-jason

[√iktor Ҡlang]

I'd recommend avoiding currentTimeMillis, use nanoTime for timings.

Cheers,

√

--
Viktor Klang

Akka Tech Lead

Typesafe - The software stack for applications that scale

Twitter: @viktorklang

[Ramesh Mandaleeka]

Thanks much. I'm not sure, if this will be listed in the list of changes of this release.

Regards,
Ramesh