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Java is Very Fast, If You Don’t Create Many Objects
(blog.vanillajava.blog)
For discussing Java, the JVM, languages that run on the JVM, and other related technologies.
When I worked for Amazon, someone had created a command line tool to be used in builds, but repeatedly starting up JVMs is painfully slow. I rewrote the app in C++ and it could be invoked 81 times vs one invocation of Java version.
If I need speed, I'll use C++. If I need developer productivity, I'll use Ruby.
You hand me till "Ruby" ROFL.