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toyboot4e / ac-library-hs

[WIP] Haskell port of ac-library.
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MaxFlow API #7

Closed toyboot4e closed 1 day ago

toyboot4e commented 1 day ago

Original ACL makes use of std::vector. Shall we follow ACL or separate Builder and MaxFlow?

toyboot4e commented 1 day ago

Growable vector requires another indirection (MutVar). I would give it a try and compare the performance.

toyboot4e commented 1 day ago

So I've implemented a GrowVec version of max flow (b61e96a). Here's a comparsion in ACLP - D, though the test case was too small:

MaxFlow:

[INFO] slowest: 0.200039 sec  (for 01-13.txt)
[INFO] max memory: 64.000000 MB  (for 01-09.txt)

MaxFlowGrow:

[INFO] slowest: 0.216807 sec  (for 01-13.txt)
[INFO] max memory: 64.000000 MB  (for 01-06.txt)

MaxFlowGrow is surely slower, but not too much. Now I'm preferring ACL-compatible API over speed.