Let S Test For Mac
In fact, let's all take a moment to look at the things you can now top your Mac & Cheese, which has more individual combos than math I am willing to do (so let's call it infinite). A simple way to confirm that there’s a problem is to test your Wi-Fi speed, which is easy to do. There are lots of Wi-Fi speed test services online that run inside any web browser. They give an accurate picture of how fast your internet connection is. Let’s take a look at how speed tests work, and how to make sure you get the best out of them. This site contains user submitted content, comments and opinions and is for informational purposes only. Apple disclaims any and all liability for the acts, omissions and conduct of any third parties in connection with or related to your use of the site.
There is increasing concern that the new 6-core MacBook Pros (in particular the i9 model) throttle under sustained load to the point where they are slower than the old 4-core MacBook Pros. To test whether this is the case, I wrote a quick stress test.
The stress test emulates a developer workload by building from scratch ten times in a row. Each iteration is timed separately to see if performance changes over time. The stress test takes between 30 minutes and 60 minutes to complete. I ran the stress test on several Macs in the office, including a MacBook Pro (Mid 2018) with an i7 processor. While I don’t have access to an i9 model yet, I expect the i7 to throttle similarly to the i9 when running multi-core tasks.
Results Here are the median build times for the Macs: Unsurprisingly the 12-core Mac Pro is the fastest Mac. However, the 6-core MacBook Pro is a close second, taking 25% longer to build Geekbench. The 4-core MacBook Pro is significantly slower than the 6-core MacBook Pro, taking 46% longer to build Geekbench. Let’s take a look at the build time variation for the Macs: Model Median Standard Deviation CoV Mac Pro (Late 2013) Intel Xeon E5-2697 v2 183.5 0.5 0.3% MacBook Pro (Mid 2018) Intel Core i7-8850H 225.8 5.7 2.6% iMac (Mid 2017) Intel Core i7 7700 237.4 1.1 0.5% MacBook Pro (Mid 2017) Intel Core i7-7820HQ 331.2 13.1 3.9% Mac Pro (Late 2013) Intel Xeon E5-1620 v2 361.6 0.3 0.1% The desktop Macs have a very low run-to-run variation, with the Coefficient of Variation (CoV) less than 0.5% for the Mac Pros and the iMac. The laptop Macs have a higher, but still reasonable, run-to-run variation of 2.6% and 3.9%.
The low variations suggest no significant throttling is happening in any of the Macs. Let’s also take a look at the multi-core Geekbench 4 scores for these Macs: If you compare the multi-core scores with the build times, you’ll see that a higher multi-core score predicts a lower build time. When running the stress test I also ran the Intel Power Gadget on the MacBook Pro (Mid 2018): Even under sustained load, the i7 processor was running at 3.0-3.1 GHz, well above the processor’s base frequency of 2.6 GHz. Conclusions So what’s going on here? Why does this test not replicate the throttling seen in other tests?
Part of the issue is the test themselves. Premiere uses both the CPU and the GPU, while Geekbench only uses the CPU. If the GPU contributes significant heat, then that will cause the CPU to throttle more aggressively.
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It’s possible the decrease in performance observed in Premiere is due to a combination of new AMD GPUs with new Intel processors, or to the new AMD GPUs themselves. My recommendation? If your work doesn’t involve long-running tasks that are CPU- and GPU-intensive (such as Premiere) then the new MacBook Pro should provide a considerable increase in performance. Otherwise, it might be wise to wait until more performance data is available.
Let S Test For Macbook
There has been some confusion (myself included) on what is vulnerable to this bug and what isn't. Some folks can replicate and some cannot - so I think its high time to test this properly to see what versions and scenarios are affected by this bug. The table below is sorted by macOS version - I'm just testing 10.13.x here. (If you happen to get it to leak the password on 10.12.x please let me know.) I'm also organizing by disk formatting scenario since I believe this is where most of the confusion comes from.
APFS encrypted volumes can be created on the disk level as well as the volume level and it truly seems to make a difference. Please also test if you find (or don't find) the results in the Unified logs and/or the install.log or neither (and god forbid any other locations you might come across!).
I'm also consistently using the 'Erase' button versus the 'Partition' button. If I am missing a certain scenario that you think should be added please let me know. If you disagree with the current findings - also let me know (I will also expect screenshots/videos from you to be sure we're on the same page.) I have tested 10.3.3 (host system) and 10.13.4 (VM) but would love someone to sanity check me - I've been wrong in the past!) I would have done more testing on different versions but have a limited set of systems as I'm traveling right now. I will update the spreadsheet below as necessary. For previous related blogs see.