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From the article:

> Memory consumption only changed slightly, with a median of 1.7% decrease of V8’s heap size for loading a representative set of websites.

What makes you believe is should be anything significant? After all the JIT-compiled code cannot be that large.

JIT code for JS is /huge/ at the lower optimization levels, dramatically larger than an interpreter's byte code by something in the order of 10x - many megs of code are generated by relatively small amounts of JS code.

The "without allocating executable memory at runtime" means "without using allocating pages that are marked as executable," not "without allocating memory."

It still runs the bloated JavaScript programs, just slower

Java did use an interpreter - it didn't get a JIT compiler until version 1.2. Java is slow for many other reasons as well.

the difference in memory usage is 1.7%, according to the article.