[MS25] Unified date formatting #1

[ppkarwasz]

Date formatting in Log4j uses different formats:

• older layouts use SimpleDateFormat,
• newer layouts use DateTimeFormatter.

While these formatters use similar patterns, the usage of both formatters causes code deduplication and performance issues.

For logging purposes a single formatter would be enough, which would:

• separate the format specifiers into a "date" part and a "time" part,
• format and cache the "date" part once a day,
• format the "time" part using a highly optimized formatter.

[jaykataria1111]

Hi @ppkarwasz , is this issue still open, can you provide, some detail on this, maybe I can pick it up 😄

[grobmeier]

Rejected and resolved in #3139 and #3337