Re: Clojure for shell scripts
Thanks, guys! Thanks, Stu; that's an option. My limited experience with clojurescript has been that it takes sort of a while to compile cljsc files; it took me maybe 3sec to compile hello world. I'm sure this up-front cost is offset by savings at future invocations; but it isn't a superior alternative in the inner loop of software development, when running the traditional way takes ~1sec. Probably I'm crazy to want to run the whole program in the inner loop. It sounds like people live in the repl during development and (require :reload-all _) when they want to test things out. I'll try to grow up and do that. In the meantime, I'm off to read the clojure implementation. If I understand these numbers correctly, it's that clojure startup isn't dominated by JVM overhead, but loading clojure.core. So it seems like it makes sense for me to understand how clojure.core is loaded. Is that maybe right? -- Ned Ruggeri On Sun, May 20, 2012 at 5:45 AM, Roberto Mannai wrote: > Maybe this experiment could interest you (clojurescript as a plugin of > gnome): > https://github.com/technomancy/lein-gnome > > In general, if AFAIK the main performance issue is the jvm startup time and > the loading of the clojure.core library, one first solution could be keeping > a single background repl process active, which could run in separated > threads every shell script feed to it via a tcp socket. Every thread should > live in a isolated sandbox in order to keep clean the overall environment. > > On Sunday, May 20, 2012, Edward Ruggeri wrote: >> >> Hey everyone!, >> >> I know this is an old story. >> >> I've played with clojure, but the main thing that has kept me from >> never looking back is the startup speed. "Hello world!" in Java takes >> me .303s, but just "java -cp clojure-1.5.0-master-SNAPSHOT.jar" takes >> 1.989s (sending C-d to close the repl even before it starts). >> Searching around here, I've found -XX:+TieredCompilation knocks me >> down to 1.581s and also >> -Xbootclasspath/a:clojure-1.5.0-master-SNAPSHOT.jar all the way to >> 0.938s. >> >> Incidentally, the same tricks with "Hello World" take me to 0.159s. >> >> Those were major improvements with very little cost; a huge win >> (thanks clojure list!). Any further easy tips and tricks? I'd like >> to get to the point where shell scripts aren't painful. It looks like >> other major hints are nailgun, and never restarting the repl during >> development. >> >> I took the liberty of printing some System.getCurrentMillis from >> clojure.main. It looks like it takes me 0.666s to enter the >> clojure.main main method, which I didn't entirely expect. There are >> several static members of clojure.main that need to be initialized, >> these members take ~.520s to initialize in total; almost all of this >> is initializing `Var REQUIRE`. Presumably this is when most of the >> clojure environment starts to get loaded? >> >> I'm just starting to look into clojure's jvm implementation; does >> anyone have some pointers on how to get quickly up to speed with the >> internals of clojure? >> >> Thanks!, >> >> -- Ned Ruggeri >> >> -- >> You received this message because you are subscribed to the Google >> Groups "Clojure" group. >> To post to this group, send email to clojure@googlegroups.com >> Note that posts from new members are moderated - please be patient with >> your first post. >> To unsubscribe from this group, send email to >> clojure+unsubscr...@googlegroups.com >> For more options, visit this group at >> http://groups.google.com/group/clojure?hl=en > > -- > You received this message because you are subscribed to the Google > Groups "Clojure" group. > To post to this group, send email to clojure@googlegroups.com > Note that posts from new members are moderated - please be patient with your > first post. > To unsubscribe from this group, send email to > clojure+unsubscr...@googlegroups.com > For more options, visit this group at > http://groups.google.com/group/clojure?hl=en -- You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Re: Clojure for shell scripts
Maybe this experiment could interest you (clojurescript as a plugin of gnome): https://github.com/technomancy/lein-gnome In general, if AFAIK the main performance issue is the jvm startup time and the loading of the clojure.core library, one first solution could be keeping a single background repl process active, which could run in separated threads every shell script feed to it via a tcp socket. Every thread should live in a isolated sandbox in order to keep clean the overall environment. On Sunday, May 20, 2012, Edward Ruggeri wrote: > Hey everyone!, > > I know this is an old story. > > I've played with clojure, but the main thing that has kept me from > never looking back is the startup speed. "Hello world!" in Java takes > me .303s, but just "java -cp clojure-1.5.0-master-SNAPSHOT.jar" takes > 1.989s (sending C-d to close the repl even before it starts). > Searching around here, I've found -XX:+TieredCompilation knocks me > down to 1.581s and also > -Xbootclasspath/a:clojure-1.5.0-master-SNAPSHOT.jar all the way to > 0.938s. > > Incidentally, the same tricks with "Hello World" take me to 0.159s. > > Those were major improvements with very little cost; a huge win > (thanks clojure list!). Any further easy tips and tricks? I'd like > to get to the point where shell scripts aren't painful. It looks like > other major hints are nailgun, and never restarting the repl during > development. > > I took the liberty of printing some System.getCurrentMillis from > clojure.main. It looks like it takes me 0.666s to enter the > clojure.main main method, which I didn't entirely expect. There are > several static members of clojure.main that need to be initialized, > these members take ~.520s to initialize in total; almost all of this > is initializing `Var REQUIRE`. Presumably this is when most of the > clojure environment starts to get loaded? > > I'm just starting to look into clojure's jvm implementation; does > anyone have some pointers on how to get quickly up to speed with the > internals of clojure? > > Thanks!, > > -- Ned Ruggeri > > -- > You received this message because you are subscribed to the Google > Groups "Clojure" group. > To post to this group, send email to clojure@googlegroups.com > Note that posts from new members are moderated - please be patient with > your first post. > To unsubscribe from this group, send email to > clojure+unsubscr...@googlegroups.com > For more options, visit this group at > http://groups.google.com/group/clojure?hl=en -- You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Re: Clojure for shell scripts
Hi Ned, I think the medium-term strategy likely to yield good results is for someone to put together a story around ClojureScript + advanced mode + V8. I know a few people have played with this, but I am not sure if anyone has gone so far as to package it up for easy consumption. Stu Stuart Halloway Clojure/core http://clojure.com > Hey everyone!, > > I know this is an old story. > > I've played with clojure, but the main thing that has kept me from > never looking back is the startup speed. "Hello world!" in Java takes > me .303s, but just "java -cp clojure-1.5.0-master-SNAPSHOT.jar" takes > 1.989s (sending C-d to close the repl even before it starts). > Searching around here, I've found -XX:+TieredCompilation knocks me > down to 1.581s and also > -Xbootclasspath/a:clojure-1.5.0-master-SNAPSHOT.jar all the way to > 0.938s. > > Incidentally, the same tricks with "Hello World" take me to 0.159s. > > Those were major improvements with very little cost; a huge win > (thanks clojure list!). Any further easy tips and tricks? I'd like > to get to the point where shell scripts aren't painful. It looks like > other major hints are nailgun, and never restarting the repl during > development. > > I took the liberty of printing some System.getCurrentMillis from > clojure.main. It looks like it takes me 0.666s to enter the > clojure.main main method, which I didn't entirely expect. There are > several static members of clojure.main that need to be initialized, > these members take ~.520s to initialize in total; almost all of this > is initializing `Var REQUIRE`. Presumably this is when most of the > clojure environment starts to get loaded? > > I'm just starting to look into clojure's jvm implementation; does > anyone have some pointers on how to get quickly up to speed with the > internals of clojure? > > Thanks!, > > -- Ned Ruggeri > -- You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Clojure for shell scripts
Hey everyone!, I know this is an old story. I've played with clojure, but the main thing that has kept me from never looking back is the startup speed. "Hello world!" in Java takes me .303s, but just "java -cp clojure-1.5.0-master-SNAPSHOT.jar" takes 1.989s (sending C-d to close the repl even before it starts). Searching around here, I've found -XX:+TieredCompilation knocks me down to 1.581s and also -Xbootclasspath/a:clojure-1.5.0-master-SNAPSHOT.jar all the way to 0.938s. Incidentally, the same tricks with "Hello World" take me to 0.159s. Those were major improvements with very little cost; a huge win (thanks clojure list!). Any further easy tips and tricks? I'd like to get to the point where shell scripts aren't painful. It looks like other major hints are nailgun, and never restarting the repl during development. I took the liberty of printing some System.getCurrentMillis from clojure.main. It looks like it takes me 0.666s to enter the clojure.main main method, which I didn't entirely expect. There are several static members of clojure.main that need to be initialized, these members take ~.520s to initialize in total; almost all of this is initializing `Var REQUIRE`. Presumably this is when most of the clojure environment starts to get loaded? I'm just starting to look into clojure's jvm implementation; does anyone have some pointers on how to get quickly up to speed with the internals of clojure? Thanks!, -- Ned Ruggeri -- You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
