I laughed, but really, the V8 JavaScript engine has come leaps and bounds in terms of performance. I recall a benchmark that found JS about 25% slower than C++, but 20% faster than Java. (citation needed)
That really depends on what was benchmarked, so much so that dropping random benchmark results is meaningless.
A benchmark like this [1] (showing c++ < js < java) is absolutely useless as the person writing it has no idea what they are doing, e.g. using vector in java.
Looking at most benchmarks java beats js more often than not, but they are often neck in neck.[2]
C++ always beats both, often by a huge margin (when written well).[3]
