Right, well-contained GC in non-critical threads is not a problem. Once you get it trying to scan all of memory, your caches get corrupted, and only global measurements can tell you what the performance impact really is.
GC enthusiasts always lie about their performance impact, almost always unwittingly, because their measurements only tell them about time actually spent by the garbage collector, and not about its impact on the rest of the system. But their inability to measure actual impact should not inspire confidence in their numbers.
GC enthusiasts always lie about their performance impact, almost always unwittingly, because their measurements only tell them about time actually spent by the garbage collector, and not about its impact on the rest of the system. But their inability to measure actual impact should not inspire confidence in their numbers.