Spectre/Meltdown Intel fix on macOS 10.13.3 — any slowdown?

Discussion in 'macOS High Sierra (10.13)' started by darnocs, Jan 25, 2018.

  1. darnocs macrumors regular

    Jul 24, 2009
    I have obviously heard of the slowdown effect the fix for Spectre and Meltdown will have, so I have delayed installing the 10.13.3 update. (Yeah, I know there's a risk—I know.)

    Has anyone noticed any sort of slowdown as a result of the update? And are there any official measurements? I have a 2013 13" MacBook Air (1.3 GHz Intel Core i5). I also have a Late 2011 MacBook Pro 13" on Sierra, but haven't updated it either since the update came out. Same question for that, I guess.
  2. simonsi macrumors 601


    Jan 3, 2014
  3. TokMok3 macrumors 6502a

    Aug 22, 2015
    Safari does not render the pages as fast as before, I can notice that on a MacBook Pro 15 Mid 2015 i7 2.8
  4. splifingate macrumors 6502


    Nov 27, 2013
    I use High Sierra {current} on both a 2015 MBP and a 2012 Mac Pro, and my User Experience is as-good or better than it was in Sierra (which, IMO, was excellent). Considering the performance of such hardware, I was not really expecting any depreciation.

    Some email-synchronisation issues post-update to HS 10.13.3 / iOS 12.2.5 but my IMAPs are now populating.

    Regards, splifingate
  5. W1SS macrumors 6502


    Aug 20, 2013
    Experiencing slowdown and sporadic freezes, especially when time machine or another heavy process is running in the background. It also appears multi-tasking performance has taken a hit on older machines.. As you can imagine, I am furious :mad:

    I'm questioning the timing of all this. Markets reaching saturation levels, sales topping out, AI replacing humans.. where can they go from here?

    cooking the books - check
    inventing wars - check
    overvaluing non-profit making companies - check
    virtual currencies - check
    planned obsolescence - check
    hang on, I have an idea!

    Let's implant agents in universities and security labs across the world, preferably not home-based so we don't draw eyes on us, and feed them with known security crippling bugs to drive demand, which we will build on fear while stunting performance to guarantee returns, so we can revive our sales.. Sure, we might have to settle class actions and what not but new sales will outperform any short-term liability.

    Rings a bell?! Conspiracy or not, I'm sick of all this milking of the average joe/jane and hope for the worst bubble of all to burst.. After all, history has taught us that it's long overdue!!

    How low can they get?
  6. Yaboze macrumors 6502a


    May 31, 2007
    The Garden State
    I haven't noticed anything different going from 10.12.6 to 10.13.3. I use Chrome though and with version 64, I believe they have added anti-Spectre support.
  7. h9826790 macrumors G5


    Apr 3, 2014
    Hong Kong
    I am using a 2009 Mac Pro (but with some upgrade as per my signature), 10.13.3 is very smooth. In fact, feels like 10.6.8 on my almost 9 years old Mac. HOWEVER, I went back to HFS+ and upgrade to 10.13.3 on the same day. So, the extra smoothness may be due to no more buggy APFS. Or even due to the "restore from backup" action which make all files in better order, etc.

    But at least, 10.13.3 can be very smooth, and no slow down. Also, Geekbench 4 still give the CPU roughly the same score as 10.13.2. In terms of performance, it looks like a "safe"upgrade at this moment.
    10.13.2.jpg 10.13.3.jpg
  8. splifingate macrumors 6502


    Nov 27, 2013
  9. hack1nt0sh macrumors member


    Jul 14, 2011
    In my case there is 10% slowdown.

    I got a logic board replacement on MBP 15" (Late 2016) last week. After the repair my MBP came with 10.12.3 installed and I upgrade to 10.13.3. As per Geekbench CPU benchmark, there is 10% performance loss as below:


    So far the performance has gone down progressively with Mac OS updates over time in last one year so I haven't realised but it was quite evident when I ran Geekbench before and after the upgrade with no other changes to the default installation.
  10. rafarataneneces macrumors newbie

    Sep 16, 2012
    I have Mac OS X 10.12.5

    I am hesitant to upgrade to Mac OS X 10.12.6

    Anybody knows if it affects performance?
  11. Morpheo macrumors 65816


    Feb 26, 2014
    I haven’t noticed any difference whatsoever on 10.12.6 since the last security/supplemental update so I’d say you’re good to go.

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10 January 25, 2018