perf: simplify JSON Date/Instant serialization DHIS2-20274#22896
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perf: simplify JSON Date/Instant serialization DHIS2-20274#22896
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Replace Joda-Time based date formatting with java.time.DateTimeFormatter for improved performance. The serializers now: - Use DateTimeFormatter directly instead of going through DateUtils - Avoid intermediate Joda DateTime conversions - Cache the formatter instance for reuse
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java.time.DateTimeFormatterDateTimeconversions inWriteDateStdSerializerandWriteInstantStdSerializerDateTimeFormatterinstance in each serializer for reuse (thread-safe)This optimization addresses date serialization showing up in CPU profiles.