Map and Spawn don't mix?

[Russel Winder]

If I do:

  auto tasks = new Tid[numberOfTasks] ;  
  foreach ( i ; 0 .. numberOfTasks ) { tasks[i] = spawn ( & partialSum , thisTid , i , sliceSize , delta ) ; }

everything workls as desired, I get parallelism and appropriate scaling.
However if I try:

  auto tasks = map ! ( ( i ) { return spawn ( & partialSum , thisTid , i , sliceSize , delta ) ; } ) ( iota ( numberOfTasks ) ) ;

the code runs but everything is serialized, no parallelism, no speed up.

I would say this is a bug, but perhaps it is a consequence of the way map works?

-- 
Russel.
=============================================================================
Dr Russel Winder      t: +44 20 7585 2200   voip: sip:russel.winder at ekiga.net
41 Buckmaster Road    m: +44 7770 465 077   xmpp: russel at russel.org.uk
London SW11 1EN, UK   w: www.russel.org.uk  skype: russel_winder
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