My understanding is that under some "huge" size, jemalloc returns allocations from particularly-sized buckets.
This makes me expect that realloc() between bucket sizes is going to always copy the data instead of just adjusting allocated metadata, because to do otherwise would mess up the bucketing. Is this so? Specifically, is it actually useful that nsStringBuffer uses realloc() as opposed to malloc(), memcpy() with actually semantically filled amount and free()? Upon superficial code reading, it seems to me that currently changing the capacity of an nsA[C]STring might uselessly use realloc to copy data that's not semantically live data from the string's point of view and wouldn't really need to be preserved. Have I actually discovered useless copying or am I misunderstanding? -- Henri Sivonen hsivo...@hsivonen.fi https://hsivonen.fi/ _______________________________________________ dev-platform mailing list dev-platform@lists.mozilla.org https://lists.mozilla.org/listinfo/dev-platform
