CPU Performance

To measure CPU performance we begin with a fairly standard measure of system responsiveness: boot time. With the last generation of upgrades to 6Gbps SATA, we saw a good decrease in boot time over the previous generation platforms. The new 13-inch MBA's PCIe SSD takes the crown as it boots ever so slightly quicker than last year's setup. In practice the difference is subtle, but something you can appreciate as the 2013 MBA's IO is just snappier all over.

Boot Performance

These next two charts look at single and multithreaded floating point performance using Cinebench 11.5. This test also gives us the rare opportunity of comparing to some older Mac Pro hardware as well from 2008 - 2010. Single threaded performance remains extremely important to overall system responsiveness, so it's always good to look at. As we found in our initial look at the new MBA, the 1.3GHz Core i5 CPU ends up performing about the same as last year's 1.8GHz part. I'd like to say it's all because of cooling and turbo boost, but in all likelihood Apple is trading some of Haswell's IPC gains for frequency here - enabling identical performance, at lower clocks thanks to Haswell's more efficient architecture.

3D Rendering Performance - Cinebench R11.5

3D Rendering Performance - Cinebench R11.5

The multithreaded performance story is a bit different. The 1.3GHz i5 regresses in performance by about 5%. Overall performance is still quicker than the 2011 models, as well as the i7 based 11-inch MBA from 2012. Here we're simply seeing the 15W TDP limits come into play. Sharing both PCH and dual-core CPU power in a lower thermal footprint than last year's CPU alone is responsible for what we see above.

Video transcoding is really best suited for the higher end machines, but that doesn't change the fact that it's done on MacBook Airs as well. We'll start by looking at performance under iMovie. Here we're importing 1080p video from a Nikon D7000 and optimizing it during import.

iMovie '11 Performance (Import + Optimize)

The 13-inch 1.3GHz Core i5 configuration performs similarly to last year's 11-inch 1.7GHz config. It's an interesting comparison because the 11-inch 2012 model is more thermally constrained than the 13-inch 2012 model, which is exactly what we see when we compare the 2013 13-inch MBA to the 2012 13-inch MBA. In this case the 2013 model is a hair quicker than the 2011.

iMovie '11 Performance (Export)

We see a similar story for a full video export. The 1.3GHz 2013 MBA slots in behind the 2011 model in this CPU bound test.

Final Cut Pro X falls on the professional end of the video production spectrum. The test file is the same here, but the workload is far more strenuous.

Final Cut Pro X - Import, Optimize, Analyze Video

Once again, we see roughly the same performance from the 13-inch 2013 1.3GHz i5 as the 11-inch 2012 MBA. Here we do see substantially better performance than the 2011 models.

Our two photo workloads generally agree with what we saw in the video tests. The 1.3GHz Haswell part is definitely slower than th e previous generation 1.7/1.8GHz SKUs:

Adobe Lightroom 3 Performance - Export Preset

Adobe Photoshop CS5 Performance

In our desktop review of Haswell I noted that performance in our compile test improved tremendously with the new architecture. As it's quite obvious that Haswell's IPC advantages don't surface all that much in our traditional suite, I wanted to see if perhaps things would be different in something that might lend itself better to Haswell's IPC improvements. I repeated our Firefox build test but under OS X. It's a multithreaded compile, with the number of threads set to 2x the number of cores (not threads) in a system. Unfortunately I came up with this bright idea while traveling, so I only had access to three machines: the 2013 13-inch MBA, the 15-inch rMBP and a 2GHz Core i7 2012 13-inch MBA. I'll add more results later, but I'm expecting this to be a part of our test suite going forward.

Xcode - Build FireFox (-sjN, N=2x Core Count)

The combination of Haswell and a really fast SSD appears to help narrow the gap between the much higher clocked 2012 model and the base 2013 13-inch MBA. Here the faster Ivy Bridge CPU is less than 2% quicker. I'll reserve final judgements until I get my hands on the 1.7GHz Core i7 model, but my guess is this is an example of the best case scenario for Haswell where you get equivalent performance to a higher clocked Ivy Bridge part but with much better thermal/noise/battery life characteristics. For example, the fan was never audible on the 2013 MBA while running this test compared to running at a very noticeable volume on the 2012 Core i7 model. The same goes for temperatures. The i7 2012 model tends to run about 5% warmer along the bottom of the chassis compared to the 2013 i5.

The CPUs The GPU: Intel HD 5000 (Haswell GT3)
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  • ddriver - Monday, June 24, 2013 - link

    They are far too biased, but then again, so are you probably, if you find them "the best" you simply are on the same direction of bias. Reply
  • darwinosx - Monday, June 24, 2013 - link

    They are not biased and you don't understand the meaning of the word. Reply
  • MonkeyPaw - Monday, June 24, 2013 - link

    Just a thought, but how about stating your concerns via constructive criticism or in the form of a question. Crying bias while continuing to visit (and therefore, support) any website just doesn't make much sense since you will be dismissed as a troll by the very people you are hoping to influence. Reply
  • CalaverasGrande - Monday, June 24, 2013 - link

    Frankly I think users that expect to play heavy 3D games on a MacBook Air with chipset video bought the wrong computer. They should have spent a few hundred more for a 15" MBP with discrete graphics. Or if they really care about games they should hop the fence and go get an Asus or some other Windows gaming notebook.
    Intel's HD4000 graphics are better than previous Intel video attempts, but still pretty weak compared to other vid chips. It's also using system ram, not dedicated ram.
    As stated, this is the mobility platform, not the performance platform.
    Reply
  • CalaverasGrande - Monday, June 24, 2013 - link

    oops, HD5000. Reply
  • darwinosx - Monday, June 24, 2013 - link

    Nobody does. But the HD 5000 is quite capable for some games. Reply
  • hyrule4927 - Monday, June 24, 2013 - link

    The lack of thermal data in these Mac reviews is rather frustrating. If this data is included in all other PC reviews in Anandtech, why is it completely ignored when reviewing Apple products? They certainly aren't immune to heat/throttling problems. Reply
  • darwinosx - Monday, June 24, 2013 - link

    You didn't read the article you are commenting on. Reply
  • hyrule4927 - Monday, June 24, 2013 - link

    If you would like to tell me where specific CPU temperature data is given, be my guest. All I see is an anecdote about fan noise and speculation about throttling in several tests. Reply
  • darwinosx - Monday, June 24, 2013 - link

    Prove that Samsung makes a better screen than LG. I bet you can't tell the difference. Reply

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