Google and Microsoft, which now both contribute to the Chromium project, apparently share concerns about the Just-In-Time (JIT) compiler in Chrome’s V8 JavaScript engine. Microsoft’s Edge Vulnerability Research (VR) team last week announced the start of testing Microsoft’s Super Duper Secure Mode (SDSM) for Edge, which works by removing Just-In-Time (JIT) compilation from the V8 processing pipeline.

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