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replacing stringstream by plain string is faster

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This commit is contained in:
Dennis Luxen 2011-07-29 16:41:32 +00:00
parent a816630f2f
commit 29fb07446a
1 changed files with 6 additions and 4 deletions
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10
DataStructures/PolylineCompressor.h
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@ -21,6 +21,8 @@ or see http://www.gnu.org/licenses/agpl.txt.
#ifndef POLYLINECOMPRESSOR_H_
#define POLYLINECOMPRESSOR_H_
#include <string>
#include "ExtractorStructs.h"
class PolylineCompressor {
@ -34,18 +36,18 @@ private:
}
inline string encodeNumber(int numberToEncode) const {
ostringstream encodeString;
string encodeString;
while (numberToEncode >= 0x20) {
int nextValue = (0x20 | (numberToEncode & 0x1f)) + 63;
encodeString << (static_cast<char> (nextValue));
encodeString += (static_cast<char> (nextValue));
numberToEncode >>= 5;
}
numberToEncode += 63;
encodeString << (static_cast<char> (numberToEncode));
encodeString += (static_cast<char> (numberToEncode));
return encodeString.str();
return encodeString;
}
inline void replaceBackslash(string & str) {