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  1. JDK
  2. JDK-8283681

Improve ZonedDateTime offset handling

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Details

    • Bug
    • Status: Resolved
    • P4
    • Resolution: Fixed
    • None
    • 19
    • core-libs
    • None
    • b16

    Description

      ZoneOffset::getRules isn't cached, so use heavily relies on escape analysis to elide the allocation. This is fragile optimization-wise, and even when it works we do extra computation that slows things down.

      Adding an abstract ZoneId::getOffset(epochSecond) means that we can avoid querying ZoneOffset::getRules altogether, eliminating the risk we miss escape analysis. Such specialization also helps the ZoneRegion case.

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              redestad Claes Redestad
              redestad Claes Redestad
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