[nikolche]

Hi, I am the author of Rapidoid, thanks!

The performance optimization is based on: - using off-heap input and output buffers, - minimizing the number of objects that are created when parsing the input and generating the output, - using object pools to reuse the objects that must be created, - using thread-local helper data structures on the I/O threads to avoid synchronization and object instantiation.

[betimsl]

What happens when you have a long database query running? Is it async (which is a bit impossible with JDBC) but does it block one of the threads in worker pool?

[MrBuddyCasino]

Thanks for the explanation! So it looks your efforts were mainly focused on reducing GC pressure - makes sense with those throughput numbers.