JDK-8180614 : Skip range and constraint checks on non-existent flags
- Type: Bug
- Component: hotspot
- Sub-Component: runtime
- Affected Version: 9,10
- Priority: P4
- Status: Resolved
- Resolution: Fixed
- Submitted: 2017-05-18
- Updated: 2020-01-17
- Resolved: 2017-05-26
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| JDK 10 |
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10 b21Fixed  |
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Description
JEP-245 code is currently looking up non-product and lp64 flags to check valid ranges and constraints, even on builds where they are emitted as constants (product and 32-bit respectively) Skipping such flags reduce the overhead of checking flags during startup by 15% on 64-bit, and skipping 64-bit only flags improves the situation even more on 32-bit builds.
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