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0 pointsextension13y ago0 comments

Java probably outperforms JRuby primarily because the JVM was designed and tuned to run Java.

But in any case, if Twitter's architecture is truly scalable then any intrinsic slowness of the language shouldn't be a big problem, because they can just toss more hardware in to compensate. What is a problem is a buggy VM that leaks memory. To run thousands of instances in a heavily instrumented way, the VM must be stable and predictable.

0 comments

thebluesky13y ago

Statically vs dynamically typed peformance difference is clear for virtually any static or dynamic language you care to name, it has nothing to do with the jvm being "tuned" for a language: http://shootout.alioth.debian.org/

igouy13y ago

>> peformance difference is clear for virtually any static or dynamic language you care to name <<

JavaScript

http://shootout.alioth.debian.org/u64/which-programs-are-fas...

justincormack13y ago

Only when they removed LuaJIT from the shootout, it is dynamic and fast (it was around where Java is in the benchmarks).

thebluesky13y ago

The LuaJIT performance is pretty impressive for a dynamically typed language, but it's hard to deny the fact that mainstream dynamically typed languages our outperformed by their static counterparts.

1 more reply

nwienert13y ago

How does that explain Julia[0]/Node.js? Both within 1-2x speed of C, I think static has less to do with it than you think.

[0] http://julialang.org/

hythloday13y ago

You pretty much have to enforce static type invariants (e.g. "this variable will never be other than an int") to JIT stuff performantly. I don't think that's a point against the GP's argument at all.

j / k navigate · click thread line to collapse

0 pointsextension13y ago0 comments

Java probably outperforms JRuby primarily because the JVM was designed and tuned to run Java.

0 comments

thebluesky13y ago

igouy13y ago

>> peformance difference is clear for virtually any static or dynamic language you care to name <<

JavaScript

http://shootout.alioth.debian.org/u64/which-programs-are-fas...

justincormack13y ago

Only when they removed LuaJIT from the shootout, it is dynamic and fast (it was around where Java is in the benchmarks).

thebluesky13y ago

The LuaJIT performance is pretty impressive for a dynamically typed language, but it's hard to deny the fact that mainstream dynamically typed languages our outperformed by their static counterparts.

1 more reply

nwienert13y ago

How does that explain Julia[0]/Node.js? Both within 1-2x speed of C, I think static has less to do with it than you think.

[0] http://julialang.org/

hythloday13y ago

You pretty much have to enforce static type invariants (e.g. "this variable will never be other than an int") to JIT stuff performantly. I don't think that's a point against the GP's argument at all.

j / k navigate · click thread line to collapse