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BSONObjBuilder::numStr optimization

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This commit is contained in:
Mathias Stearn 2009-11-05 11:27:26 -05:00
parent 4aeeedc9f6
commit edd9f57e7f
2 changed files with 20 additions and 0 deletions
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13
db/jsobj.cpp
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@ -1566,5 +1566,18 @@ namespace mongo {
}
}
const string BSONObjBuilder::numStrs[] = {
"0", "1", "2", "3", "4", "5", "6", "7", "8", "9",
"10", "11", "12", "13", "14", "15", "16", "17", "18", "19",
"20", "21", "22", "23", "24", "25", "26", "27", "28", "29",
"30", "31", "32", "33", "34", "35", "36", "37", "38", "39",
"40", "41", "42", "43", "44", "45", "46", "47", "48", "49",
"50", "51", "52", "53", "54", "55", "56", "57", "58", "59",
"60", "61", "62", "63", "64", "65", "66", "67", "68", "69",
"70", "71", "72", "73", "74", "75", "76", "77", "78", "79",
"80", "81", "82", "83", "84", "85", "86", "87", "88", "89",
"90", "91", "92", "93", "94", "95", "96", "97", "98", "99",
};
} // namespace mongo

7
db/jsobj.h
View File

@ -1426,7 +1426,14 @@ namespace mongo {
b.decouple(); // post done() call version. be sure jsobj frees...
}
private:
static const string numStrs[100]; // cache of 0 to 99 inclusive
public:
static string numStr( int i ) {
if (i>=0 && i<100)
return numStrs[i];
stringstream o;
o << i;
return o.str();