DisableIntrinsic filtering code looks for the vmIntrinsic name in the comma-separated list:

  ccstr disable_intr = NULL;
  if ((DisableIntrinsic[0] != '\0' && strstr(DisableIntrinsic, vmIntrinsics::name_at(id)) != NULL) ||
      (!compilation_context.is_null() &&
       CompilerOracle::has_option_value(compilation_context, "DisableIntrinsic", disable_intr) &&
       strstr(disable_intr, vmIntrinsics::name_at(id)) != NULL)
  ) {
    tty->print_cr("Disabling intrinsic %s by DisableIntrinsic", vmIntrinsics::name_at(id));
    return true;
  }

Which means that supplying -XX:DisableIntrinsic=_copyOfRange matches *both* _copyOf and _copyOfRange intrinsics. I think the code should actually look for the vmIntrinsic name to be followed with a comma or \0. It gets much worse when you are trying to disable some new intrinsic, e.g. _getCharStringU, and (Unsafe::)_getChar gets disabled along.

Makes performance work more tedious than it should nominally be.