High Resolution Time is the spec that defines performance.now(), a precise and monotonic clock for Web apps. It is republished as Candidate Recommendation by the Web Perf WG as it has needed a substantive update: the clock was too precise (!) w3.org/TR/2018/CR-hr-time-2-…

Indeed, the #Spectre and #Meltdown attacks revealed early January can be exploited in browsers - since these attacks rely on precise timing, reducing the precision of performance.now() was quickly identified as a way to reduce the risks of exploitation

The updated specification thus no longer suggests a minimum level of accuracy. There is still ongoing discussion on what the new recommendation should be github.com/w3c/hr-time/issue…

In particular, @mdrejhon has been expressing detailed concerns about the impact of reduced accuracy for some use cases (e.g. gaming). If you have ideas or concerns, head to the github repo github.com/w3c/hr-time/