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a less gc-producing ImmutableText.subtext

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peter
2014-05-25 18:49:47 +02:00
parent 2dc1af84d7
commit 4b7dc584a7
1 changed files with 6 additions and 1 deletions
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platform/util/src/com/intellij/util/text/ImmutableText.java
+6 -1
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@@ -97,7 +97,7 @@ public final class ImmutableText extends ImmutableCharSequence implements CharAr
}
private ImmutableText ensureChunked() {
if (length() >= BLOCK_SIZE && myNode instanceof LeafNode) {
if (length() > BLOCK_SIZE && myNode instanceof LeafNode) {
return new ImmutableText(nodeOf(((LeafNode)myNode)._data, 0, length()));
}
return this;
@@ -402,6 +402,9 @@ public final class ImmutableText extends ImmutableCharSequence implements CharAr
@Override
Node subNode(int start, int end) {
if (start == 0 && end == nodeLength()) {
return this;
}
int length = end - start;
char[] chars = new char[length];
System.arraycopy(_data, start, chars, 0, length);
@@ -467,6 +470,8 @@ public final class ImmutableText extends ImmutableCharSequence implements CharAr
return _head.subNode(start, end);
if (start >= cesure)
return _tail.subNode(start - cesure, end - cesure);
if ((start == 0) && (end == _count))
return this;
// Overlaps head and tail.
return _head.subNode(start, cesure).concatNodes(_tail.subNode(0, end - cesure));
}