Re: M4 1.4.10b [beta] released

Eric Blake <[email protected]> wrote:
> Here's what I installed on the argv_ref branch instead - it likewise shows
> an impressive speedup, even without implementing memchr2 or using
> freadahead yet (but those two steps can only help), and it will be much
> easier to port to the master branch.  Thanks again for reporting this hot
> spot in execution, and forcing me to come up with a nicer way to optimize it.
>
> http://git.sv.gnu.org/gitweb/?p=m4.git;a=commitdiff;h=7468916

Hi Eric,

In the above, I noticed this:

+  while (1)
+    {
+      size_t len;
+      const char *buffer = next_buffer (&len, false);
+      if (buffer)
+       {
+         const char *p = (char *) memchr (buffer, '\n', len);

That cast looks unnecessary -- unless you care about C++ compilers.