big-data/hadoop
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

HADOOP-17901. Performance degradation in Text.append() after HADOOP-1… (#3411)

Browse Source
This commit is contained in:
pbacsko 2021-09-11 01:01:37 +02:00 committed by GitHub
parent 971f1b8b0a
commit 827e19271a
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 5 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/io/Text.java
View File

@ -268,8 +268,7 @@ public void set(byte[] utf8, int start, int len) {
*/
public void append(byte[] utf8, int start, int len) {
byte[] original = bytes;
int capacity = Math.max(length + len, length + (length >> 1));
if (ensureCapacity(capacity)) {
if (ensureCapacity(length + len)) {
System.arraycopy(original, 0, bytes, 0, length);
}
System.arraycopy(utf8, start, bytes, length, len);
@ -302,7 +301,10 @@ public void clear() {
*/
private boolean ensureCapacity(final int capacity) {
if (bytes.length < capacity) {
bytes = new byte[capacity];
// Try to expand the backing array by the factor of 1.5x
// (by taking the current size + diving it by half)
int targetSize = Math.max(capacity, bytes.length + (bytes.length >> 1));
bytes = new byte[targetSize];
return true;
}
return false;