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< > BotCompany Repo | #1035569 // stupidFib_collab - stupidFib as a massively parallel function!

JavaX fragment (include) [tags: use-pretranspiled]

Libraryless. Click here for Pure Java version (9223L/51K).

// Main function that user can call
static long stupidFib_collab(ICollab collab, int n) {
  ret collab_computeLong2(collab, continuation -> stupidFib_collab(collab, n, continuation));
}

// Work function used internally
svoid stupidFib_collab(ICollab collab, int n, LongConsumer continuation) {
  // switch to serial if no coworkers, OR if small enough work unit
  if (collab.singleCore() || n < 24) ret with continuation.accept(stupidFib(n));
  
  // recursion base
  if (n < 3) ret with continuation.accept(1);
  
  // recursion step
  var collector = longPairCollector((a, b) -> continuation.accept(a+b));
  collab.addWork(-> stupidFib_collab(collab, n-1, collector.a));
  collab.addWork(-> stupidFib_collab(collab, n-2, collector.b));
}

/*

// Both functions in one using the "parallel" modifier
static parallel long stupidFib_collab(int n) {
  // switch to serial if no coworkers, OR if small enough work unit
  if (collab.singleCore() || n < 24) ret stupidFib(n);
  
  // recursion base
  if (n < 3) ret 1;
  
  // recursion step
  var collector = longPairCollector((a, b) -> ret a+b);
  collab.addWork(-> stupidFib_collab(collab, n-1, collector.setA()));
  collab.addWork(-> stupidFib_collab(collab, n-2, collector.setB()));
}

*/

Author comment

Began life as a copy of #1035566

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Travelled to 3 computer(s): elmgxqgtpvxh, mowyntqkapby, mqqgnosmbjvj

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Snippet ID: #1035569
Snippet name: stupidFib_collab - stupidFib as a massively parallel function!
Eternal ID of this version: #1035569/26
Text MD5: e8869546fb889c61bbcbb648ca2feb06
Transpilation MD5: 965b76052e4273e340432f54d9edc74e
Author: stefan
Category: javax / maths
Type: JavaX fragment (include)
Public (visible to everyone): Yes
Archived (hidden from active list): No
Created/modified: 2022-06-19 04:22:48
Source code size: 1273 bytes / 36 lines
Pitched / IR pitched: No / No
Views / Downloads: 53 / 167
Version history: 25 change(s)
Referenced in: [show references]