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Will I see some speed improvment by replacing the original 5400-rpm with a SSD on a MBP Core2Duo with Filevault2 enabled? Or it is a waste of money?

I ask this question because I know Filevault tend to kill performance of SSD on Core2Duo since this cpu doesnt have the AES-ni instructions as i5-i7 have...

I didnt find many benchmarks results...

My current HDD stats with Filevault2 enabled are (measured with XBench):

Sequential:
  Uncached Write: 46MB/s (4K blocks)
  Uncached Write: 30MB/s (256K blocks)
  Uncached Read: 15MB/s (4K blocks)
  Uncached Read: 42MB/s (256 blocks)
Random:
  Uncached Write: 0.95MB/s (4K blocks)
  Uncached Write: 18MB/s (256 blocks)
  Uncached Read: 0.39MB/s (4K blocks)
  Uncached Read: 15MB/s (256 blocks)

UPDATE: I installed a Crucial M4 here is the new stats:

Sequential:
  Uncached Write: 153MB/s (4K blocks)
  Uncached Write: 97MB/s (256K blocks)
  Uncached Read: 23MB/s (4K blocks)
  Uncached Read: 130MB/s (256 blocks)
Random:
  Uncached Write: 93MB/s (4K blocks)
  Uncached Write: 101MB/s (256 blocks)
  Uncached Read: 13MB/s (4K blocks)
  Uncached Read: 119MB/s (256 blocks)

As you see, a nice boost even if it's only a non-AES-NI Core Duo 2.26 with Filevault2 enabled

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2 Answers 2

up vote 1 down vote accepted

You will see a great improvement in performance. You will lose some performance due to the encryption but you will at least get two and half times the performance of your current drive.

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you were right, thanks –  pieuvre Oct 25 '12 at 20:56
    
@pieuvre Happy to help. You should mark my answer as correct. :) –  Alex Oct 26 '12 at 11:43
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I used to have a HDD on my mac mini 2009 (intel core duo 2) and it was pretty slow! So I switched to a SSD and everything launched and performed a LOT faster!

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Was that using filevault? –  Mark Oct 21 '12 at 10:16
    
@Mark I honestly don't know –  JomanJi Oct 22 '12 at 13:32
    
@JomanJl - filevault is the whole issue for the question –  Mark Oct 22 '12 at 13:34
    
@Mark Oh sorry, I didn't know that –  JomanJi Oct 22 '12 at 14:10
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