21–30 of 31 posts
I'm migrating to HHVM across my whole stack. Massive performance gains, only issues have been with some plugins that I was able to pretty easily work around. Good stuff! Uncached, HHVM outperforms my cached php-fpm sites.
So, a couple of questions: a. Does the HHVM JIT do anything that LuaJIT doesn't? I assume you are familiar with LuaJIT, as it is mentioned in the paper - and from a quick scan, the only two things I didn't recognize from LuaJIT were the refcount optimizations (not required by Lua GC) and guard relaxation. b. Is HHIR tied to Php, or is it usable as a general purpose JIT backend? LuaJIT's IR is, (unfortunately for othe…
It's a shame. As far as I can tell, the only proven multi-language JIT for FOSS platforms is still the JVM? (and Mono maybe?) Despite a lot of that's gone in to Parrot, PyPy, v8, etc, none of these VMs seem to have really taken off beyond the language they were intended for. Somewhat more sad is that pretty much all de-facto default runtimes for popular dynamic languages (except Javascript) are still interpreters...…
This is awesome! I am not familiar with how compilers/VMs are generally implemented, but the tracelets and guards idea strikes me as very general - in particular, it looks like this approach could be applied to provide type inference to any dynamically typed language. Has this kind of thing been tried before? In terms of optimization, is it possible to create tracelets that are not continuous regions in code? Roughly…
This is awesome! I am not familiar with how compilers/VMs are generally implemented, but the tracelets and guards idea strikes me as very general - in particular, it looks like this approach could be applied to provide type inference to any dynamically typed language. Has this kind of thing been tried before? In terms of optimization, is it possible to create tracelets that are not continuous regions in code? Roughly…
EDIT: That's what I get for not reading the paper first.
This is awesome! I am not familiar with how compilers/VMs are generally implemented, but the tracelets and guards idea strikes me as very general - in particular, it looks like this approach could be applied to provide type inference to any dynamically typed language. Has this kind of thing been tried before? In terms of optimization, is it possible to create tracelets that are not continuous regions in code? Roughly…
EDIT: That's what I get for not reading the paper first.
Earlier quoted context omitted.
It's a shame. As far as I can tell, the only proven multi-language JIT for FOSS platforms is still the JVM? (and Mono maybe?) Despite a lot of that's gone in to Parrot, PyPy, v8, etc, none of these VMs seem to have really taken off beyond the language they were intended for. Somewhat more sad is that pretty much all de-facto default runtimes for popular dynamic languages (except Javascript) are still interpreters...…
I wouldn't say the JVM is a proven multi-language JIT, FOSS or not. It works for multiple languages that go the extra mile - e.g. Jython pays very dearly in performance because of the object model mismatch between Python and Java. And I haven't looked closely recently, but when Clojure first came out, the impedance mismatch between Clojure's persistent data structures and Java's mutable ones also had a ridiculous per…
Future times should be interesting as well. I'd be interested to know if the work on value types in the JVM would be useful for Clojure.
So, a couple of questions: a. Does the HHVM JIT do anything that LuaJIT doesn't? I assume you are familiar with LuaJIT, as it is mentioned in the paper - and from a quick scan, the only two things I didn't recognize from LuaJIT were the refcount optimizations (not required by Lua GC) and guard relaxation. b. Is HHIR tied to Php, or is it usable as a general purpose JIT backend? LuaJIT's IR is, (unfortunately for othe…
Earlier quoted context omitted.
It's a shame. As far as I can tell, the only proven multi-language JIT for FOSS platforms is still the JVM? (and Mono maybe?) Despite a lot of that's gone in to Parrot, PyPy, v8, etc, none of these VMs seem to have really taken off beyond the language they were intended for. Somewhat more sad is that pretty much all de-facto default runtimes for popular dynamic languages (except Javascript) are still interpreters...…
What about Guile?
I've been trying this on my few remaining PHP based sites and finding it great. Can we now get the same for Python? ;-)