How does this vary from flatland/drip? -Zack On Tuesday, October 8, 2013 9:49:16 PM UTC-5, Phil Hagelberg wrote: > > When we've polled Leiningen users in the past[1], the #1 pain point > people always report is its startup time. While there have been a number > of strategies suggested to reduce the annoyance of slow JVM startup time > and project loading, keeping your JVMs around can lead to awkward > workflows in some situations given the tooling we've had so far. > > To this end I'm happy to announce the release of Grenchman, a tool for > executing Clojure code in a running process *quickly*: > > http://leiningen.org/grench.html > > With Grenchman you can launch an nREPL server in the background > (typically with `lein trampoline repl :headless`, but you can also embed > an nREPL server in a production setting) and then connect to it directly > From the command-line with minimal overhead: > > $ time grench eval '(println "Hello, world!")' > Hello, world! > > real 0m0.117s > user 0m0.024s > sys 0m0.024s > > This opens up a number of new command-line-centric workflows. > > You can also invoke Leiningen tasks from Grenchman if you launch a > separate out-of-project `lein repl :headless` server: > > $ time grench lein version > Leiningen 2.3.3 on Java 1.6.0_27 OpenJDK 64-Bit Server VM > real 0m0.118s > user 0m0.032s > sys 0m0.020s > > Finally, Grenchman includes its own interactive nREPL client using GNU > Readline: > > $ grench repl > user=> (System/getProperty "user.dir") > "/home/phil/src/syme" > [...] > > Plans for the next version[3] include completion in the repl client and > support for repl history and multi-line form input. While it is a very > young project, the non-interactive functionality is quite stable. > > Please give Grenchman a try if this sounds interesting to you. The > install process is the same as Leiningen where you download and chmod an > executable, except that there is a different executable for different > platforms; I have precompiled binaries for several common platforms at > the link above and will post user-contributed builds for other platforms > I don't have access to if there is demand. > > thanks, > Phil > > [1] - https://lein-survey-2013.herokuapp.com/results and > https://lein-survey-2012.herokuapp.com/results > > [2] - https://github.com/technomancy/leiningen/wiki/Faster > > [3] - > https://github.com/technomancy/grenchman/issues?milestone=2&state=open > > [4] - Grenchman was inspired to a degree by Jark > (http://icylisper.github.io/jark/) but does not share any code with > it. > > [5] - Timings above are taken from my 4½-year-old laptop; newer hardware > would perform better. >
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