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Subject: Re: [boost] [Block Pointer] benchmark
From: Phil Bouchard (philippe_at_[hidden])
Date: 2011-05-27 17:07:32

On 5/27/2011 6:25 AM, Frank Mori Hess wrote:
> My cpu cores turn down their clock frequency when idle to save power, and I
> don't know how long it takes to switch speeds. Maybe the cpu clock speed is
> jumping from low to high speed while the benchmark is running.

I get different results after changing the priority:

# nice --20 .../benchmark
auto_ptr: 9602673 ns
shared_ptr: 21695797 ns
block_ptr: 136451426 ns

auto_ptr: 10390549 ns
shared_ptr: 21044471 ns
block_ptr: 237520341 ns

# nice -20 .../benchmark
auto_ptr: 9317126 ns
shared_ptr: 17450029 ns
block_ptr: 69507905 ns

auto_ptr: 5028312 ns
shared_ptr: 10538796 ns
block_ptr: 117030907 ns

Although worker_make looks faster for auto_ptr & shared_ptr, it is
slower for block_ptr. The assembly code is still much simpler for
worker_new and it should be faster.


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