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8242848: Improve performance of InflaterOutputStream.write()

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Reviewed-by: stuefe, vtewari, redestad, lancea
This commit is contained in:
Volker Simonis 2020-04-23 14:23:53 +02:00
parent 4f05f3f885
commit 2594f0b9b8
3 changed files with 215 additions and 20 deletions
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24
src/java.base/share/classes/java/util/zip/InflaterOutputStream.java
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@ -1,5 +1,5 @@
/*
* Copyright (c) 2006, 2013, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2006, 2020, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
@ -236,16 +236,9 @@ public class InflaterOutputStream extends FilterOutputStream {
// Fill the decompressor buffer with output data
if (inf.needsInput()) {
int part;
if (len < 1) {
break;
}
part = (len < 512 ? len : 512);
inf.setInput(b, off, part);
off += part;
len -= part;
inf.setInput(b, off, len);
// Only use input buffer once.
len = 0;
}
// Decompress and write blocks of output data
@ -256,13 +249,14 @@ public class InflaterOutputStream extends FilterOutputStream {
}
} while (n > 0);
// Check the decompressor
if (inf.finished()) {
break;
}
// Check for missing dictionary first
if (inf.needsDictionary()) {
throw new ZipException("ZLIB dictionary missing");
}
// Check the decompressor
if (inf.finished() || (len == 0)/* no more input */) {
break;
}
}
} catch (DataFormatException ex) {
// Improperly formatted compressed (ZIP) data