Issue 738925  describes memory leak of OSX page table entries. It was fixed by confining data page allocations in V8's heap to 4GB region randomly chosen at V8 isolate creation time.

In addition to that fix, we might want to ensure that the 4GB region is reused when V8 isolates are created and destroyed in a loop.

This scenario happens with workers on some websites as shown in  Issue 870054 .