From: Marco Costalba <mcostalba@gmail.com>
Date: Tue, 6 Dec 2011 13:18:04 +0000 (+0100)
Subject: Prefer empty() to size()
X-Git-Url: https://git.sesse.net/?p=stockfish;a=commitdiff_plain;h=3527a42063c3fc44fdaf85cd9ca0a81013fc17a7

Prefer empty() to size()

As Heinz says:

"Function empty() should have a constant run-time even
 on lousy compilers and you spare the not.

The change is even measurable: + 100-150 nodes/sec. Wow:-)"

Patch from Heinz van Saanen

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
---

diff --git a/src/search.cpp b/src/search.cpp
index 77acd89e..3cae0e3f 100644
--- a/src/search.cpp
+++ b/src/search.cpp
@@ -507,7 +507,7 @@ namespace {
     Rml.init(pos, rootMoves);
 
     // Handle special case of searching on a mate/stalemate position
-    if (!Rml.size())
+    if (Rml.empty())
     {
         cout << "info" << depth_to_uci(DEPTH_ZERO)
              << score_to_uci(pos.in_check() ? -VALUE_MATE : VALUE_DRAW, alpha, beta) << endl;