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?

Commencez par OpenMetricsTextFormatWriter.java à la ligne indiquée par le lien et examinez comment le projet cible Java 8. Étudiez ensuite les options de publication d’artefacts et de JAR multi-release décrites dans l’issue. Le travail sera considéré comme terminé lorsqu’une approche documentée et approuvée par les maintainers pour réduire ces allocations dans le code TextFormatWriter concerné sera définie.