Extra allocations in `*TextFormatWriter` because of Java 8 target

See this line of code:

https://github.com/prometheus/client_java/blob/fa68aa7789c53d54ea1783f120194a3feae7e7b8/prometheus-metrics-exposition-textformats/src/main/java/io/prometheus/metrics/expositionformats/OpenMetricsTextFormatWriter.java#L412

Because of the Java 8 target, the string concatenation gets compiled to something like new StringBuilder().append(name).append(suffix).toString(), which allocates the memory at least twice (for the buffer in the StringBuilder and for the resulting string).

If the code was compiled for at least Java 9, it would use StringConcatFactory, which in this case would allocate the memory only for the resulting string.

Would the maintainers consider publishing multiple artifacts for different Java targets, or using multi-release JARs for the purpose of this and similar optimizations?

Comienza con OpenMetricsTextFormatWriter.java en la línea enlazada y revisa cómo el proyecto apunta a Java 8. Después, investiga las opciones de publicación de artefactos y de JAR multi-release descritas en el issue. Se considerará terminado cuando exista un enfoque documentado y aprobado por los maintainers para reducir estas asignaciones en el código relevante de TextFormatWriter.