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Application shows slowdown when transferring data after compressing.

thread dump & pstack shows lot of threads churning around JNI_Get*Critical methods which are attributing to the slowness.

It seems GZIP class methods are going critical which causes the slowness.
###@###.### 2004-12-10 05:34:16 GMT

backported by

Backport - A issue that is required to port a Bug or Feature into another product release. This issue type is generally associated with the main Bug/Feature to represent each individual release of the port. JDK-2129005 GZipOutputStream/InputStream goes critical(calls JNI_Get*Critical) and causes slowness

Backport - A issue that is required to port a Bug or Feature into another product release. This issue type is generally associated with the main Bug/Feature to represent each individual release of the port. JDK-2130892 GZipOutputStream/InputStream goes critical(calls JNI_Get*Critical) and causes slowness

relates to

Bug - A problem which impairs or prevents the functions of the product. JDK-6348045 REGRESSION: serious performance degradation as GZIPInputStream is slower

Bug - A problem which impairs or prevents the functions of the product. JDK-6356456 REGRESSION: GZIPInputStream is slower on 1.4.2_10 than on 1.4.2_09

Bug - A problem which impairs or prevents the functions of the product. JDK-6507183 REGRESSION: slower performance of GZIPInputStream for 5u10 (single threaded testcase)

Bug - A problem which impairs or prevents the functions of the product. JDK-6438254 Very slow performance from GZIPInputStream in JDK 1.5.0_07-b03

Bug - A problem which impairs or prevents the functions of the product. JDK-6751338 ZIP inflater/deflater performance

Bug - A problem which impairs or prevents the functions of the product. JDK-5043044 GZIPOutputStream doesn't scale on 4way Windows systems

Bug - A problem which impairs or prevents the functions of the product. JDK-6623164 severe performance issues with JDK GZIP classes and object serialization

Backport - A issue that is required to port a Bug or Feature into another product release. This issue type is generally associated with the main Bug/Feature to represent each individual release of the port. JDK-2132422 REGRESSION: serious performance degradation as GZIPInputStream is slower

Bug - A problem which impairs or prevents the functions of the product. JDK-5072161 OutOfMemoryError while using GZIPOutputStream

Bug - A problem which impairs or prevents the functions of the product. JDK-6507548 REGRESSION: slower performance of GZIPInputStream for 5u10 (multi threaded testcase)

Bug - A problem which impairs or prevents the functions of the product. JDK-6975829 Perf. of gzip in existing JDKs is too slower than in 1.3.1

Enhancement - null JDK-6399199 Improve performance of Deflater

(9 relates to)