Google’s Spectre Fix Increases Chrome RAM Usage by 10 Percent

Google’s Spectre Fix Increases Chrome RAM Usage by 10 Percent

Most vulnerabilities in modern computer systems are patched without any noticeable impact for end users. That’s not necessarily the case with Meltdown and Spectre, which strike at the very heart of microprocessors functionality. A new round of Spectre flaws have appeared, but Google is in the process of adding functionality to desktop Chrome that will block remote execution of Spectre. The downside, however, is Chrome will use even more RAM than it already does.

Spectre targets a feature of microprocessors called speculative execution, which performs calculations that may be needed ahead of time. This increases overall system performance dramatically, but it also opens the door to attacks that can read data in memory that is supposed to remain private. Rolling out patches for both Spectre and Meltdown has been a complicated process, some of which can impact system performance.

Google v67 build of Chrome contains a feature called Site Isolation to combat Spectre attacks. This feature has been available in Chrome since v63, but it was behind a developer flag. Now, it’s on by default for everyone. Site Isolation makes Spectre attacks less dangerous by using a separate renderer for each domain. Chrome has always had a multi-process architecture separated by tabs, but a single tab could render content from multiple domains by way of cross-site iframes or clever JavaScript. That setup could theoretically allow a Spectre exploit to read data belonging to other domains on the page, like your passwords or browser cookies.

Google’s Spectre Fix Increases Chrome RAM Usage by 10 Percent

Enforcing Site Isolation comes with a drawback, though. Using a separate renderer for every domain means more active renderers, and thus, more memory usage. Chrome is already notorious for high RAM usage, but it could be 10-13 percent higher with Site Isolation enabled. This feature already rolled out in the beta and dev channels, so some of you have experienced the effects.

While this feature has rolled out widely, Google says about 1 percent of desktop Chrome users still won’t have Site Isolation right away. Google is holding that group back so it can test the effects and make sure the change is working correctly. They’ll get Site Isolation later if everything goes as planned. The Android version of Chrome has Site Isolation later because of the different OS concerns. It will be an option in v68, though. The iOS version of Chrome runs on Apple’s rendering engine because of platform restrictions, so Google can’t make any rendering changes there.

Continue reading

Hands On: How Mazda’s Gasoline-Powered Diesel May Lift MPG 20-30 Percent

Creativity flows from the smallest of automakers: The SkyActiv-X engine compresses gasoline until it self-combusts. It uses ultra-lean air/fuel mixtures, low enough to sometimes need a spark plug to start (only) combustion.

MIT Neural Network Processor Cuts Power Consumption by 95 Percent

MIT has developed new neural network processing methods that could cut the power consumption of existing solutions by up to 95 percent. It's a sea change that could effectively reinvent the nature of AI — and where such workloads are performed.

ET Deals Roundup: Last Chance to Pre-Order Galaxy S9 up to 50 Percent Off, $600 Lenovo Micro Desktop, and more

The Galaxy S9 is coming out soon, and this is one of the last opportunities to pre-order and save big. Depending on which provider you order from, you can potentially save up to 50 percent with trade-ins and credits in play. We also found great bargains on 4K TVs, home automation gear, and laptops, so take a look.

ET Deals Roundup: Up to 50 Percent off Logitech Sale, 20 Percent off Echo Spot, and more

For today only, you can save up to 51 percent on select Logitech accessories on Amazon. Mice, keyboards, speakers, and more are all being sold at steep discounts. And if you’re in the market for a digital assistant, you can snag an Echo Spot or an Echo Show on the cheap.Amazon Daily Deal: Logitech Peripherals…