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SOLR-276: improve JSON writer speed 

git-svn-id: https://svn.apache.org/repos/asf/lucene/solr/trunk@551170 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Yonik Seeley 2007-06-27 14:17:29 +00:00
parent 951dab2048
commit 79b3ef65c3
2 changed files with 18 additions and 11 deletions
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1
CHANGES.txt
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@ -78,6 +78,7 @@ New Features
Changes in runtime behavior
Optimizations
1. SOLR-276: improve JSON writer speed. (yonik)
Bug Fixes
1. Make TextField respect sortMissingFirst and sortMissingLast fields.

30
src/java/org/apache/solr/request/JSONResponseWriter.java
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@ -458,7 +458,6 @@ class JSONWriter extends TextResponseWriter {
public void writeStr(String name, String val, boolean needsEscaping) throws IOException {
writer.write('"');
// it might be more efficient to use a stringbuilder or write substrings
// if writing chars to the stream is slow.
if (needsEscaping) {
@ -471,33 +470,40 @@ class JSONWriter extends TextResponseWriter {
characters (U+0000 through U+001F).
*/
StringBuilder sb = new StringBuilder(val.length()+8);
sb.append('"');
for (int i=0; i<val.length(); i++) {
char ch = val.charAt(i);
switch(ch) {
case '"':
case '\\':
writer.write('\\');
writer.write(ch);
sb.append('\\');
sb.append(ch);
break;
case '\r': writer.write("\\r"); break;
case '\n': writer.write("\\n"); break;
case '\t': writer.write("\\t"); break;
case '\b': writer.write("\\b"); break;
case '\f': writer.write("\\f"); break;
case '\r': sb.append('\\').append('r'); break;
case '\n': sb.append('\\').append('n'); break;
case '\t': sb.append('\\').append('t'); break;
case '\b': sb.append('\\').append('b'); break;
case '\f': sb.append('\\').append('f'); break;
// case '/':
default: {
if (ch <= 0x1F) {
unicodeEscape(writer,ch);
unicodeEscape(sb,ch);
} else {
writer.write(ch);
sb.append(ch);
}
}
}
}
sb.append('"');
writer.append(sb);
} else {
writer.write(val);
}
writer.write('"');
writer.write(val);
writer.write('"');
}
}