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Improve performance DataCOnversion util method to get ASCII from bytes - using string buffer instead of concatentation improves extraction speed by 2 orders of magnitude on larger files

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This commit is contained in:
adam-m 2011-12-16 12:19:01 -05:00
parent adb3488852
commit 9b22b67c9f
1 changed files with 10 additions and 10 deletions
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18
DataModel/src/org/sleuthkit/autopsy/datamodel/DataConversion.java
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@ -133,8 +133,8 @@ public class DataConversion {
Charset.forName("UTF-8").newEncoder();
*/
String result = "";
String temp = "";
StringBuilder result = new StringBuilder();
StringBuilder temp = new StringBuilder();
int counter = 0;
//char[] converted = new java.lang.System.Text.Encoding.ASCII.GetString(args).ToCharArray();
@ -147,26 +147,26 @@ public class DataConversion {
// the printable ASCII chars are dec 32-126
// and we want to include TAB as well (dec 9)
if (!((dec < 32 || dec > 126) && dec != 9)) {
temp = temp + Character.toString(tempChar);
temp.append(Character.toString(tempChar));
counter = counter + 1;
} else {
if (counter >= parameter) {
// add to the result and also add the new line at the end
result = result + temp + Character.toString(NL);
result.append(temp);
result.append(Character.toString(NL));
// reset the temp and counter
temp = "";
temp = new StringBuilder();
counter = 0;
}
// reset the temp and counter
temp = "";
temp = new StringBuilder();
counter = 0;
}
}
result = result + temp;
return result;
result.append(temp);
return result.toString();
}
/**