Useless use of realloc

Oh look :

$ strace -etrace=mremap perl -e '$s.="x"for 1..300_000' 2>&1 | head -1
mremap(0xb7c3b000, 262144, 262144, MREMAP_MAYMOVE) = 0xb7c3b000

This is on linux. The mremap syscall is used by the glibc to implement
realloc under linux. But here, the old size and the new size of the
memory blocks are the same, which means that at some point we probably
called realloc() without needing to.

That's annoying.

• Useless use of realloc by Rafael Garcia-Suarez
• Re: Useless use of realloc by Nicholas Clark