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optimize for the more common case of single value facets when loading values

This commit is contained in:
kimchy 2010-12-22 09:04:35 +02:00
parent 59ee8493ce
commit d283c158d2
1 changed files with 41 additions and 21 deletions
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52
modules/elasticsearch/src/main/java/org/elasticsearch/index/field/data/support/FieldDataLoader.java
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@ -40,11 +40,11 @@ public class FieldDataLoader {
loader.init();
field = StringHelper.intern(field);
int[][] ordinals = new int[reader.maxDoc()][];
int[] ordinals = new int[reader.maxDoc()];
int[][] multiValueOrdinals = null;
int t = 1; // current term number
boolean multiValued = false;
TermDocs termDocs = reader.termDocs();
TermEnum termEnum = reader.terms(new Term(field));
try {
@ -55,16 +55,43 @@ public class FieldDataLoader {
termDocs.seek(termEnum);
while (termDocs.next()) {
int doc = termDocs.doc();
int[] ordinalPerDoc = ordinals[doc];
if (multiValueOrdinals != null) {
int[] ordinalPerDoc = multiValueOrdinals[doc];
if (ordinalPerDoc == null) {
ordinalPerDoc = new int[1];
ordinalPerDoc[0] = t;
ordinals[doc] = ordinalPerDoc;
multiValueOrdinals[doc] = ordinalPerDoc;
} else {
multiValued = true;
ordinalPerDoc = Arrays.copyOf(ordinalPerDoc, ordinalPerDoc.length + 1);
ordinalPerDoc[ordinalPerDoc.length - 1] = t;
ordinals[doc] = ordinalPerDoc;
multiValueOrdinals[doc] = ordinalPerDoc;
}
} else {
int ordinal = ordinals[doc];
if (ordinal == 0) { // still not multi valued...
ordinals[doc] = t;
} else {
// move to multi valued
multiValueOrdinals = new int[reader.maxDoc()][];
for (int i = 0; i < ordinals.length; i++) {
ordinal = ordinals[i];
if (ordinal != 0) {
multiValueOrdinals[i] = new int[1];
multiValueOrdinals[i][0] = ordinal;
}
}
// now put the current "t" value
int[] ordinalPerDoc = multiValueOrdinals[doc];
if (ordinalPerDoc == null) {
ordinalPerDoc = new int[1];
ordinalPerDoc[0] = t;
multiValueOrdinals[doc] = ordinalPerDoc;
} else {
ordinalPerDoc = Arrays.copyOf(ordinalPerDoc, ordinalPerDoc.length + 1);
ordinalPerDoc[ordinalPerDoc.length - 1] = t;
multiValueOrdinals[doc] = ordinalPerDoc;
}
}
}
}
@ -81,17 +108,10 @@ public class FieldDataLoader {
termEnum.close();
}
if (multiValued) {
return loader.buildMultiValue(field, ordinals);
if (multiValueOrdinals != null) {
return loader.buildMultiValue(field, multiValueOrdinals);
} else {
// optimize for a single valued
int[] sOrders = new int[reader.maxDoc()];
for (int i = 0; i < ordinals.length; i++) {
if (ordinals[i] != null) {
sOrders[i] = ordinals[i][0];
}
}
return loader.buildSingleValue(field, sOrders);
return loader.buildSingleValue(field, ordinals);
}
}