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Type:
Enhancement
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Resolution: Fixed
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Priority:
P4
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Affects Version/s: None
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Component/s: security-libs
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None
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b05
By caching default constructors used in java.security.Provider::newInstanceUtil in a ClassValue, we can reduce the overhead of allocating instances in a variety of places, e.g., MessageDigest::getInstance, without compromising thread-safety or security.
See: https://cl4es.github.io/2021/01/04/Investigating-MD5-Overheads.html#reflection-overheads for context. Doing this reduces memory allocations made by repeated calls to MessageDigest.getInstance("MD5") by 120 bytes/op, and I expect similar improvements would show up in more places.
See: https://cl4es.github.io/2021/01/04/Investigating-MD5-Overheads.html#reflection-overheads for context. Doing this reduces memory allocations made by repeated calls to MessageDigest.getInstance("MD5") by 120 bytes/op, and I expect similar improvements would show up in more places.
- duplicates
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JDK-8229958 Provider.getService() scalability issue for legacy algorithm and message digest
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- Closed
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- relates to
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- Resolved
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- Open
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- Closed
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(1 links to)