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MacBook Pro i7 CPU Performance and Memory Speed
Related: bandwidth, laptop, MacBook, MacBook Pro, Macs, memory
This page analyzes raw CPU performance.
See the system configuration notes.
MemoryTester — memory bandwidth
See MemoryTester for details on this test.
The memory controller of the Core i7 delivers up to 46% better bandwidth for multi-threaded code! This is a real test with threads(pthreads) in a real C++ program, not theory.
MemoryTester — compute
See MemoryTester for details on this test. The graphs below are for 1/2/3/4 CPU threads on the horizontal axis.
Even though memory itself is the same speed (1066MHz), the memory controller of the Core i7 delivers superior bandwidth.
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SHA1 hash (CPU task with memory access)
Hyperthreading (3 or 4 threads) delivers a small improvement here, but not much.
Pure computation with no memory access
Hyperthreading (3 or 4 threads) delivers almost zero improvement.
Pure memory access: copy and compare memory.
The memory controller of the Core i7 delivers up to 29% better bandwidth with two threads copying and comparing memory.
Hyperthreading (3 or 4 threads) achieves nothing, as expected.
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