From 9983cccf14d04d1d9e3520428599f06e03b8321d Mon Sep 17 00:00:00 2001
From: Erik Verbruggen <erik.verbruggen@digia.com>
Date: Tue, 15 Apr 2014 15:28:06 +0200
Subject: V4 IR: reduce runtime cost.

- Replace 2 QHash<BasicBlock *, ...> with QVector<...>, where the
  basic-block index is the index of the vector.
- Nearly all QHashes and QSets will have a minimal fill rate. So,
  initialize/reserve all of them with a reasonable minimal size to
  prevent re-allocations and re-hashing.

Change-Id: Iade857991d73fddd0b92cecb8d458064b253a08d
Reviewed-by: Simon Hausmann <simon.hausmann@digia.com>
---
 src/qml/compiler/qv4jsir.cpp | 1 +
 1 file changed, 1 insertion(+)

(limited to 'src/qml/compiler/qv4jsir.cpp')

diff --git a/src/qml/compiler/qv4jsir.cpp b/src/qml/compiler/qv4jsir.cpp
index a067a95104..d77a92eab1 100644
--- a/src/qml/compiler/qv4jsir.cpp
+++ b/src/qml/compiler/qv4jsir.cpp
@@ -164,6 +164,7 @@ struct RemoveSharedExpressions: IR::StmtVisitor, IR::ExprVisitor
     void operator()(IR::Function *function)
     {
         subexpressions.clear();
+        subexpressions.reserve(function->basicBlockCount() * 8);
 
         foreach (BasicBlock *block, function->basicBlocks()) {
             if (block->isRemoved())
-- 
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