Blog

Engineering posts about async.java — performance, design, comparisons with other JVM orchestration libraries, and how the library fits with Project Loom.

• May 18, 2026
  Tracking down a Whilst race, and finishing the variance pass

  v0.2.9 fixes a sync-body race in NeoWhilst.RunMap and widens the Concat family to accept the Asyncc.Task shorthand. The race story is the interesting half.</p> </li>

• May 17, 2026
  async.java vs Akka Streams: a load-curve story

  Where the 3-4× tail-latency gap comes from, why it isn't magic, and what it means for picking a JVM async coordination library in 2026.

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