scala-native 試してみた

社内 Scala Meetup 2016-05-26

Transcript

1. scala-native
   ࢼͯ͠Έͨ
   @atty303
   

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2. scala-native ͱ͸?
   4 ωΠςΟϒόΠφϦΛు͘ Scala ίϯύΠϥ
   4 LLVM ϕʔε
   4 LLVM ͷ Scala ϑϩϯτΤϯυ
   4 ϝϞϦ؅ཧ͸ Bohem GC
   

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3. LLVM IR Λు͘·Ͱ
   

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4. LLVM IR Ҏ߱
   

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5. ϥϯλΠϜϥΠϒϥϦ
   4 scala-native/javalib
   4 scala-js ͔Β͖࣋ͬͯͨ Java API ࣮૷
   4 io, lang, math, util ͙Β͍
   4 scala-native/nativelib
   4 scala-native ϥϯλΠϜ
   4 Annotation ఆٛ΍ϙΠϯλܕͳͲ
   4 scala-native/scalalib
   4 Scala ϥϯλΠϜϥΠϒϥϦ
   4 scala-native/clib
   4 C ͷඪ४ϥΠϒϥϦ (stdlib.h, stdio.h ͱ͔)
   

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6. ϥϯλΠϜϥΠϒϥϦ
   4 ࠓͷͱ͜Ζ .a ΍ .so ͸࡞Εͳ͍Α͏Ͱɺશ෦ιʔε͔ΒϏϧυ͠
   ͯϦϯΫͯ͠Δ
   4 Java API ͕جૅతͳ΋ͷ͔͠ͳ͍ → طଘͷ Java ࢿ࢈͸࢖͑ͳ͍
   4 JVM Ͱ͸ͳ͍ͷͰ .class ͸࢖͑ͳ͍ → .jar ΋࢖͑ͳ͍
   4 Pure Scala ͷϥΠϒϥϦ͸࢖͑Δ
   4 C ͷϥΠϒϥϦ΋࢖͑ΔͷͰؤுΔ
   4 ঢ়گతʹ͸ scala-js ͱಉ͡?
   

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7. ݴޠ࢓༷
   4 ΄ͱΜͲ Scala ͱಉ͡
   4 ωΠςΟϒͷͨΊͷ֦ு͕͋Δ
   

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8. ߏ଄ମએݴ
   @struct class Vec(
   val x: Double,
   val y: Double,
   val z: Double
   )
   4 C ͷ struct ͱͷ૬ޓӡ༻ͷͨΊ ?
   4 ελοΫʹ഑ஔͰ͖Δ class Λએݴ͢ΔͨΊ ?
   4 C# ͷ class(ࢀরܕ)/struct(஋ܕ) ͷΑ͏ͳৼ෣͍?
   

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9. ελοΫͱϙΠϯλ
   @struct class Rect(val w: Double, val h: Double) {
   def area: Double = w * h
   }
   def main(args: Array[String]): Unit = {
   val p: Ptr[Rect] = stackalloc[Rect] // ελοΫׂΓ౰ͯ΁ͷϙΠϯλ
   !p = new Rect(2, 3) // ϙΠϯλ͕ࢦ͢ϝϞϦ΁ͷ஋֨ೲ
   fprintf(stdout, c"%f\n", (!p).area) // ϙΠϯλͷࢀর֎͠
   }
   4 Scala ͰϙΠϯλૢ࡞!!!
   

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10. C ؔ਺ͷݺͼग़͠
    @extern object stdio {
    def printf(format: CString, args: Vararg*): CInt = extern
    }
    def main(args: Array[String]): Unit = {
    stdio.printf(c"hello, world!")
    }
    4 CString = Ptr[Byte] ͳͲͷΑ͏ʹ C ͷܕͱޓ׵ੑͷ͋Δ
    Scala ܕ͕͋Δ
    

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11. ಈ͔͢
    scala-native ͷ demo ϓϩδΣΫτ
    ͷ࣮ߦ࣌ؒΛൺֱͯ͠ΈΔ
    4 ϨΠτϨʔγϯάͷϓϩάϥϜ
    

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12. Ϗϧυ
    $ git clone git@github.com:scala-native/scala-native.git
    $ cd scala-native/docker
    $ ./manage.sh build
    $ ./manage.sh run
    4 scala ϥΠϒϥϦͷ git clone ʹࣦഊͨ͠Γͨ͠ͷͰ
    build.sbt ͷ಺༰ΛखಈͰ࣮ߦͨ͠Γ…
    

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13. ࣮ߦ࣌ؒ
    native | 12.2008
    clang | 10.9654
    jvm | 10.7632
    gcc | 7.3218
    4 time ίϚϯυͰ 5 ճܭଌͨ͠ͱ͖ͷฏۉ஋
    4 ࣮ߦ଎౓͸ॳظஈ֊ͷׂʹ͸݈ಆ͍ͯ͠Δ
    4 LLVM ͍͢͝!
    

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14. ىಈ࣌ؒ
    jvm | 0.2758
    native | 0.004
    4 ىಈ࣌ؒ͸଎͍!
    4 ͚Ͳ JVM ͷ 0.3 ඵऑ΋ผʹ஗͍ͱ͍͏΄ͲͰ͸ͳ͍…
    

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15. ࢖͍Ͳ͜Ζ
    4 PC (Desktop / Server) ʹ͸ඞཁͳͦ͞͏͔ͳ…
    4 ARM ʹϏϧυͰ͖ΔΑ͏ʹͳΕ͹…
    4 JVM Λಈ͔͢΄ͲϦιʔεͷͳ͍Ϛγϯ(IoT)޲͚ͷϓ
    ϩάϥϜΛ Scala Ͱॻ͚Δͱ͔
    4 iOS ͷωΠςΟϒΞϓϦΛ Scala Ͱॻ͚ΔՄೳੑ?
    

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16. ࢀߟ
    4 ࡞ऀ Denys Shabalin ࢯͷϓϨθϯ
    https://github.com/densh/talks/blob/
    517b20c30dd4aaf390785039cdd002f623eaa91e/
    2016-05-11-scala-goes-native.pdf
    

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