Apple's system performance drastically? Not upgrade may be more dangerous

Do not know the recent classmates iPhone have not received the push version update? According to the original temper, see a new version I am sure the first time immediately upgraded; But this time I heard before upgrading this one Trail newsThis system do not casually chaos, I heard that after the upgrade cell phone performance lost in half. 'Scared me to push the phone are hesitant to see it, so what the hell is it all? Let us explore together.

On the upgrade iOS 11.2.2 system back to the performance decline caused the news first came out in a Dutch media, in its test data given, After upgrading iOS 11.2.2 system iPhone performance actually dropped by 41%, but it is limited to the iPhone 6s test So I specifically collected the various iPhones that I can find so far to verify that the news is real.

No. 1 upgrade system in the end will not affect the performance? Not necessarily

If you are iPhoneX / 8 / 8P or iPhone7 / 7P users, then please upgrade the system, the update is basically no difference in the run points.Even because I did not restart before running iPhone8P clean the background, causing the system upgrade reinstall the system Running points even slightly increased.

If you are iPhone 6S / 6SP and earlier versions of mobile phone users, then I'm afraid after upgrading the system will inevitably encounter the problem of performance reduction.I found a friend from where I ran iPhone6s Plus significantly lower than the original 4000 + A lot, but this phone itself is also used quite a long time, the battery down to bring the problem of aging is worse.

However, even without this performance reduction problem, I am afraid there are a lot of iPhone6 ​​/ 6S users have given up upgrading their own system to ensure the smooth operation of the phone. So it sounds like the system upgrade with our relationship is not great? Anyway, after the upgrade can be used, the performance will not be affected, but the performance has been greatly reduced to stop the system upgrade.So the fact is it true?

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No.2 No upgrade if it will Zeyang? Lost personal information even more serious

We already know that this system update led to performance is reduced because of the processor design to make up for two loopholes.Not to upgrade naturally means that your cell phone is still waiting for the back door to visit hackers.Although we have not The virus or Trojan horse found to be based on this vulnerability is prevalent, but if you have malicious people who have mastered the exploit of this loophole and you are not up to date, your personal information is in jeopardy.

So while we may lose some performance after installing this patch, it may be more dangerous if not upgraded.After all, there are some sensitive information that can be dangerous if accessed.However, there is another comforting thing This loophole simply divulges your personal information without controlling your device, and if other authentication is complete, it is still very difficult to steal your Alipay. (It is only relatively difficult and does not represent a guarantee of safety.)

No.3 Meltdown and specter What is it?

Here we use a metaphor from kprismk, a netizen from NGA, but here is just a metaphor for a great deal of detail and omission.

1.French restaurant selling fries, chicken wings, coke and hamburger.

2. Xiao Ming went to the restaurant to order a hamburger, left after eating.

3. Paparazzi a paparazzi row behind the small Ming, with the waiter said: I want to point and Xiaoming the same.

4. Order a small sister said, I am sorry you have one in front, wait for the next.But after listening to the kitchen, he made a hale slipper.

5 .. turn a dog Aberdeen ordered, order a small sister said: can not be such a point, encroaching on the privacy of others, the security pulled out this paparazzi!

6..b paparazzi row behind a paparazzi, to the little sister said: French fries, chicken, burger, coke, a point, starve to death, which one of the first to give me.

7.b paparazzi first got a hamburger!

8.b paparazzi know what to eat lunch today Xiaoming!

To the current level of technological development, in fact, limit the performance of the processor in most cases is not a calculation of memory but the speed of memory. So how to improve memory read efficiency as much as possible? Simply speaking, the processor Will guess in advance what action will be carried out next, and implemented in advance, if speculation errors will be rolled back to normal.

By turning on similar features, the processor can dramatically speed up the run, demonstrating on the simulator's validation that the performance of off-chip postprocessors such as out-of-order execution and speculative execution can be lost by half or more. Including Apple, Google and other vendors have provided their own updates to solve this problem, and the impact on performance is not too much.

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No.4 I do not want to upgrade the system, how should I protect my information security?

Then the answer to the question of what we can do to ensure the security of our information is plainly obvious: even if all our end devices are instantly patched, especially devices that regularly access the Internet, it may be of primary concern to the average person There are two types: PC and mobile phone.

This exploit Web attack will be the most dangerous, because this form of attack will be very easy to implement. An attacker can induce users to visit sites with malicious JavaScript and use JavaScript to infect a large number of users through website advertisements. An attacker can also invade a website and perform a download attack without being able to detect that the legitimate website has been compromised.

There's only one real solution: a complete push through the hardware vendor's push, but there are several temporary alternatives to this approach because of its own limitations.

Phone / Android: Because the domestic Android basic depth customization of various manufacturers, Project Treble is too early, you want to use Google's patch the first time is impossible.However, we can first Web portal protection, The latest updates on Chrome and Firefox have all solved the problem.

Phone / apple:I thought the same as the iPhone with Android, just change a browser can temporarily avoid the danger that this loophole may bring, until I found that all the original iOS inside the processor are all based on the Safari kernel. That is, If you want to fix this loophole, at present, only upgrade this system can go this way.

PC / Windows: What if you are win10 users, and the processor is intel five generations or more, please feel at ease using the official patch, the impact on performance and not too much If you are using is intel four generations and the following processors, but also just use the win7 / win8.1 these systems, then you may have to carefully consider whether to accept the loss of performance of this matter The solution to this problem is still For a safe little browser (The meaning of security is not to write a secure browser.)

PC / MacOS:With the user's choice of Windows roughly the same, Upgrade your system or change your browser However, in general, Mac users upgrade systems are relatively fast, not as serious as the windows platform fragmentation problems.

Of course, all vendors are also actively make up for the impact of this processor loophole may be when you see this article, there have been other browsers or systems have been patched this loophole, Tencent Xuanwu Labs introduced An online testing tool that allows you to check in advance whether you are using a browser or not.

However, just like the ransomware we have experienced the last time, it is still not hard to protect personal devices as early as possible, so it is not difficult to protect the personal devices. Several experiences also tell us, if the hardware support, it is best to immediately lay the patch upgrade system more reliable. (This article deals with the processor technology and principles of some reference from the fruit shell network and Sohu technology, to express my gratitude. )

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