> or patch the runtime code A huge spike in CPU usage would be treated as a regression in other language runtimes and would likely be addressed. The fact that

> or patch the runtime code A huge spike in CPU usage would be treated as a regression in other language runtimes and would likely be addressed. The fact that this is solvable with advanced JVM knobs is both good and bad. Good in the way you say. Bad because the complexity of maintaining all those knobs makes it difficult if not impossible to improve the runtime defaults, and every runtime problem becomes a tuning problem.