Is glibc being generalist still true? I might be wrong here, but I had the impression it was open and free but behind most others,and e.g. tcmalloc is better o

Is glibc being generalist still true? I might be wrong here, but I had the impression it was open and free but behind most others,and e.g. tcmalloc is better on most criteria. Do we have benchmarks and comparisons for the generalist case?