[question] daemon concept #413

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1. aartiPl commented on Nov 26, 2023

   

   aartiPl

   on Nov 26, 2023

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   Hi! This is an interesting idea. I am very curious about the real gains of daemon implementation compared to the implementation without daemon.
2. ybznek commented on Dec 22, 2023

   

   ybznek

   on Dec 22, 2023

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   Startup time of compiled (.jar) script
   if it is an issue it could be compiled into native code (https://www.graalvm.org/latest/reference-manual/native-image/basics/), but the binary is roughly 8MB at minimum (maybe could be adjusted more?) and compilation is slow.
   Task of gradle daemon is "just" compilation. Shared daemon across various scripts would require some isolation - e.g. you don't want to kill daemon if one of scripts call exit(), etc.

   Initial startup time of not complied script:
   I've done experiment with my <1 day project similar to kscript.
   I do not call kotlinc, but ./gradlew and pass variables like srcDir, dependencies, .. via env. variables
   First start with kscript seems to be roughly 6x slower than my solution with running gradle daemon

   Significant slowdown of kscript seems to be due to resolution of dependency. My solution just collect
   runtimeClasspath from gradle (/home/z/.gradle/caches/modules-2/files-2.1/org.jsoup/jsoup/1.16.2/5d39ff6d1b8331c376a04c50c6716afbcdfe567d/jsoup-1.16.2.jar) - and let gradle to download that.

   Script:

   #!/usr/bin/env /home/z/projects/kotlin/kscript2/runner/kscript2
   @file:DependsOn("org.jsoup:jsoup:1.16.2")
   import org.jsoup.Jsoup
   println("a")
   println( Jsoup.parse("<html><body id=\"b\">sth</body></html>")!!.getElementById("b")!!.text())
   

   First run with kscript:

   time kscript /home/z/projects/kotlin/kscript2/runner/src/test/resources/source/main.kts a
   [kscript] Resolving org.jsoup:jsoup:1.16.2...
   a
   sth
   kscript  a  5,37s user 0,50s system 263% cpu 2,225 total
   

   First run with my experiment with running daemon:

   time /home/z/projects/kotlin/kscript2/runner/src/test/resources/source/main.kts a
   a
   sth
   /home/z/projects/kotlin/kscript2/runner/src/test/resources/source/main.kts a  0,86s user 0,16s system 98% cpu 1,027 total
   
   

   👍React with 👍1Reacted by listvin
3. aartiPl commented on Dec 26, 2023

   

   aartiPl

   on Dec 26, 2023

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   Nice - 6x improvement in start-up looks very promising 👍
4. listvin commented on Jan 10, 2024

   

   listvin

   on Jan 10, 2024

   Last edited by listvin

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   @ybznek thanks for actual minifyed timing sample! Can you please share your project as repo?

   Shared daemon across various scripts would require some isolation - e.g. you don't want to kill daemon if one of scripts call exit(), etc.

   Nice concern. Do you have more ideas of isolation cases?
   Regarding .exit probably auto-restarting daemon, if it exits or crashes on its own (not via ~ $ kscriptd stop-daemon), would be sufficient at least for a poc-version?