On Wed, 13 Sep 2023 14:22:35 GMT, 温绍锦 <d...@openjdk.org> wrote:
>> improve date toString performance, includes: >> >> java.util.Date.toString >> java.util.Date.toGMTString >> java.time.Instant.toString >> java.time.LocalDate.toString >> java.time.LocalDateTime.toString >> java.time.LocalTime.toString > > 温绍锦 has updated the pull request incrementally with one additional commit > since the last revision: > > simplify LocalDate::getChars For DateTimeFormatter, it first isn't effectively constant since its composite printerparser isn't immutable/stable. Also we can probably try if we can pre-allocate like for string concat to see if eliminated allocations help. For StringBuilder allocation, if JIT cannot eliminate it, we can probably switch to writing byte array + index since the interface in Formatter seems to be internal. ------------- PR Comment: https://git.openjdk.org/jdk/pull/15658#issuecomment-1732565954
