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Type: Enhancement
Resolution: Fixed
Priority: P3
Fix Version/s: 10
Affects Version/s: hs23
Component/s: hotspot
Labels:
- classloading
- performance

Subcomponent:
runtime
Resolved In Build:
b21
CPU:

generic
OS:

generic

Improve access time for loaded class cache (system dictionary).

..is it possible that the internal data structure might one day change from monolithic hash table to something more hierarchical? For example having a separate data structure per package or per classloader. I was reading online about something called a HAT-trie that deals with shared prefixes and was designed with cache locality in mind.

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duplicates

JDK-8057655 Empty delegating URLClassLoader performance is erratic

Closed

JDK-8002329 Replace -XX:StringTableSize flag with -XX:PredictedInternedStringCount

Closed

relates to

JDK-8185590 ShouldNotReachHere from ClassLoaderData::try_get_next_class()

Closed

JDK-8184765 Dynamically resize SystemDictionary

Resolved

JDK-8184994 Add Dictionary size logging and jcmd

Resolved

JDK-8180325 Use ClassLoaderData::classes_do for CDS classes

Resolved

JDK-8166848 Performance bug: SystemDictionary - optimization

Resolved

JDK-7114376 Make system dictionary hashtable bucket array size configurable

Closed

JDK-8057655 Empty delegating URLClassLoader performance is erratic

Closed

(4 relates to)

Assignee:: Coleen Phillimore

Reporter:: Karen Kinnear (Inactive)

Votes:: 0 Vote for this issue

Watchers:: 4 Start watching this issue

Created:: 2012-01-24 18:42

Updated:: 2019-05-22 13:11

Resolved:: 2017-07-28 08:57

Imported:: 17/Sep/12 5:28 AM

Indexed:: 19/Jul/12 9:01 PM

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