An interesting test comparison between MacBook Airs with and without FileVault turned on has been making the rounds. I was ready to publish a link to this post, but then I decided to run the FileVault ‘on’ test with my MacBook Air. Here’s where my numbers fall in comparison to the linked posts:
|Machine:||2010 FV (Jay’s)||2010 FV (Ben’s)|
|Uncached Write 4K||120.4 MB/sec||167.14 MB/sec|
|Uncached Write 256K||75.9 MB/sec||92.07 MB/sec|
|Uncached Read 4K||12.7 MB/sec||12.86 MB/sec|
|Uncached Read 256K||90.9 MB/sec||98.2 MB/sec|
|Uncached Write 4K||46.0 MB/sec||45.76 MB/sec|
|Uncached Write 256K||72.4 MB/sec||84.54 MB/sec|
|Uncached Read 4K||6.7 MB/sec||9.36 MB/sec|
|Uncached Read 256K||66.2 MB/sec||82.34 MB/sec|
So my machine performs better in most tests — what needs to be noted is that the machine specs are vastly different. Jay is using an 11.6″ Air with the 1.6 Core 2 Duo processor, 4GB of RAM and the 128GB Toshiba SSD. I am using a 13″ MacBook Air with a 2.13 Core 2 Duo processor, 4GB of RAM and the 256GB Toshiba SSD. I am not sure if it is the processor, SSD size or the possible difference in free space on the drive accounting for the difference (or all of the above) — but there is a difference. Even with the performance difference I still don’t notice it.
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