Where did you see that? I've never come across that reputation before, only that the JVM has more usage (in high-perf scenarios) because it was cross-platform a

Where did you see that? I've never come across that reputation before, only that the JVM has more usage (in high-perf scenarios) because it was cross-platform and had a bigger community. .NET always had very good performance and the new .NET Core cross-platform framework and runtime is now consistently among the fastest in various performance benchmarks for all kinds of applications.