CODEWITHSUNDEEP
performancedebuggingvisual-c++
user2912108
user2912108

Reputation: 737

MSVC 2013 generated debug code is too slow to be useful

Any way to speed this up without losing any of the debugging functionality? Compared to debugging with clang on mac/linux the generated code is horribly slow.

Upvotes: 2

Views: 101

Answers (3)

Nick Westgate
Nick Westgate

Reputation: 3273

This blog post has the full explanation of the OP's solution - referred to in his comment on Nikolay's answer: "I gained alot more back by setting "basic runtime checks" to Default. This got me almost to the speed of clang's debug builds."

This solution still works for the same problem in VS 2015.

Upvotes: 0

Nikolay
Nikolay

Reputation: 12245

You could also try to disable debug heap by setting _NO_DEBUG_HEAP=1

See here more information about that:

http://ofekshilon.com/2014/09/20/accelerating-debug-runs-part-1-_no_debug_heap-2/

Upvotes: 2

Mike Dunlavey
Mike Dunlavey

Reputation: 40689

Find out why it's slow. This is how I find out. My off-the-cuff-probably-wrong guess is it could be in data validation. When you find out what it's doing you can probably turn it off by tweaking some compiler flags.

A way to do that is to make a release configuration, clone it, and then turn on symbol-retention and turn off compile-time optimization. This way you can debug it, but without turning on all the data structure validation, index checking, debug-new, etc .

Upvotes: 0

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