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Comment: hash table lookup optimization (Score 1) 97

by pifko (#36002506) Attached to: Inside Mozilla's New JavaScript JIT Compiler

I wonder how do javascript engines optimize hash table lookups. Especially since it is faster to access a member of an object than to access a variable of an outer function. It seems to me that the former requires a hash table lookup with a string key while the later suffices with a pointer into the closure of an outer function and the offset of the variable.

Firefox

+ - Firefox 5 Details: Sharing, Home Tab, PDF Viewer->

Submitted by Anonymous Coward
An anonymous reader writes "Firefox 4 may be still new, but Firefox 5 is already being prepared by Mozilla. At least the UI features have been laid out by the Mozilla team — there are nine new features in total. There are some features that are replicating Chrome functionality (tab multi-select or an integrated PDF viewer that will also extend to other file formats), but there are completely new features such as tab web apps, an identity manager a home tab that replaces the home button as well as a social sharing feature that is integrated in the URL bar and enables users to post directly to their Facebook and Twitter pages."
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