Do a quick test with the latest JVM.
Print Hello, world.
That's it. Time it.
Do the same with Python.
The difference is minuscule.
People don't build CLIs with them due to cultural reasons (fashion). Developers are creatures of fashion.
Print Hello, world.
That's it. Time it.
Do the same with Python.
The difference is minuscule.
People don't build CLIs with them due to cultural reasons (fashion). Developers are creatures of fashion.
java: 031s python: 013s
it's 3x slower to start up… it means that any bash script with a loop calling a java command will run 3x slower.
3x slower isn't my definition of minuscule.
I'm confused, what kind of time measurement system is this? Are those 31 seconds versus 13 seconds? 0.31s vs 0.13s? If it's the first case, something is wrong with that machine, Hello World should not take that long. If it's the second, are we talking about 0.18s? See below.
> it's 3x slower to start up… it means that any bash script with a loop calling a java command will run 3x slower.
I don't know how you write your scripts, but in practice most scripts hang waiting for IO (especially network) or waiting for a specific command to process something...
> 3x slower isn't my definition of minuscule.
Nope, but based on what you've presented so far, unless I'm misunderstanding, it's my definition of "premature optimization".
> I don't know how you write your scripts,
You know how… I put print hello world in them… that was the test you asked for?
> premature optimization
Not using something that has 3x startup time, for a short lived command is just "common sense".
I'm starting to think that the issue here is that you know java but don't know python or C, and you are unconsciously trying to get water to your own watermill.
It's just that I recognize disingenuous comments.
Java is perfectly adequate as a language for writing command line tools. You're likely using one of them weekly and don't even know it.
Just don't write your Java CLIs using Spring or DI frameworks in general :-)
doubtful, since I don't have jre installed. I had to install it just to run that benchmark.
There is a reason I didn't say anything about that aspect of JITs that you mention, it's because it's not relevant to commands which are launched from shell scripts and then exit.