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俺の話を聞け！！LT大会 #8でトークした資料です

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1. ʙय़ͩʂՖคͩʂ-5େձͩ͊͊͊͋͋͋͋ʂʂʂ̍ʙ
   !QZBNB(.01FQBCP *OD
   Զͷ࿩Λฉ͚ʂʂ-5େձ
   -JOVYίϚϯυͰϘτϧωοΫ
   Λௐ΂Δ
   

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2. ϗεςΟϯάࣄۀ෦νʔϑςΫχΧϧϦʔυ
   
   ࢁԼ࿨඙!QZBNB
   

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3. ϖύϘ෱Ԭ
   

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4. αʔόαΠυɺϑϩϯτΤϯυɺ
   ΠϯϑϥΤϯδχΞશһདྷͯ͘Εʂʂʂʂ̍
   ࠷৽ͷ࠾༻৘ใΛνΣοΫˠ !QC@SFDSVJU
   

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5. Ϙτϧωο
   Ϋௐࠪ
   

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6. ʮͳΜ͔Θ͔ΒΜ͚Ͳɺ
   Կ͔͕஗ͯ͘
   ॲཧ͕ॏ͍ʯ
   

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7. ಄ѱͦ͏
   

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8. ύϑΥʔϚϯεղੳʹ͸
   ͍͔ͭ͘ͷखஈ͕͋Δ
   

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9. ͳΜ͔͍͍ͩͨͲͷձࣾʹ΋͍Δ͍͢͝ਓʹฉ͘
   w͍͢͝ਓʹฉ͘ͱɺ͍͍ͩͨղܾͯ͘͠ΕΔ
   w͍͢͝ਓ͸͍͢͝ͷͰɺͦͷ৔ͰΘ͔Βͳͯ͘΋ɺ͍͍ͩͨ࣍ͷ೔ʹ

   ʮࡢ೔ͷ͋ΕΘ͔ͬͨΑʂʂʂʯͱ͔ௐ΂͖ͯͯ͘ΕΔ
   w͍͢͝ਓʹฉ͘ͱɺ͍͢͝ਓ͕ؤுΔ͚ͩͰɺࣗ෼͕ؤுΒͳ͍͔Β
   ࣗ෼͕੒௕͠ͳ͍
   

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10. ϓϩϑΝΠϦϯά
    wIUUQTHJUIVCDPNUNNTUBDLQSPG
    ݴޠ໊ϓϩϑΝΠϥ<ݕࡧ>
    

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11. -JOVYͷίϚϯυͰௐ΂Δ
    wHEC5IF(/6%FCVHHFS
    wTUSBDF5SBDFTZTUFNDBMMTBOETJHOBMT
    wQFSG1FSGPSNBODFBOBMZTJTUPPMTGPS-JOVY
    wWBMHSJOEBTVJUFPGUPPMTGPSEFCVHHJOHBOEQSPpMJOHQSPHSBNT
    

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12. ࣄྫ
    

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13. NSVCZͷ"1*ΞΫηε͕཯଎
    NSVCZ
    DMJFOU "1*4FSWFS
    SFTPVSDFFYBNQMF
    NSVCZͷ$MJFOU͔Β͋Δ"1*Λ࣮ߦͯ͠
    .#ͷϨεϙϯεΛऔಘ͢Δ৔߹
    +40/
    

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14. ࣄྫ
    ॠؒతʹ(CZUF͘Β͍
    ϝϞϦ࢖͏
    

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15. WBMHSJOEͰϝϞϦͷΞϩέʔγϣϯΛݟΔ
    # valgrind curl http://localhost/resource/example > /dev/null
    …
    ==18619== HEAP SUMMARY:
    ==18619== in use at exit: 0 bytes in 0 blocks
    ==18619== total heap usage: 1,863 allocs, 1,863 frees, 211,125 bytes allocated
    # valgrind /home/pyama/mruby test.rb
    …
    ==12811== HEAP SUMMARY:
    ==12811== in use at exit: 0 bytes in 0 blocks
    ==12811== total heap usage: 51,721 allocs, 51,721 frees, 12,028,345,116 bytes allocated
    

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16. ʗ ?P?
    ʘ(
    

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17. TUSBDFͰγεςϜίʔϧͷ౷ܭΛऔΔ
    # strace -fc /home/pyama/mruby test.rb
    % time seconds usecs/call calls errors syscall
    ------ ----------- ----------- --------- --------- ----------------
    73.00 0.006317 2 3361 munmap
    23.27 0.002014 11 183 brk
    2.62 0.000227 0 1734 read
    1.11 0.000096 0 3380 mmap
    0.00 0.000000 0 3 write
    0.00 0.000000 0 16 open
    0.00 0.000000 0 23 close
    NVONBQ͕ࢧ഑త
    IUUQTMJOVYKNPTEOKQIUNM-%1@NBOQBHFTNBONNBQIUNM
    

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18. QFSGΛར༻ͯ͠ίʔϧάϥϑΛऔಘ͢Δ
    IUUQNSVCZPSHEPDTBQJIFBEFSTNSVCZ@'TUSJOHIIUNMNSC@TUS@QMVTGVODUJPO
    # perf record --call-graph dwarf -- /home/pyama/mruby test.rb
    # perf report -g -G —stdio
    94.35% 0.03% mruby mruby [.] mrb_str_plus
    |
    ---mrb_str_plus
    |
    --20.06%-- mrb_vm_exec
    mrb_vm_run
    …
    NSC@TUS@QMVT͕ࢧ഑త
    

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19. ৘ใ͔ΒԾઆΛཱͯΔ
    wॲཧ͸)551ϦΫΤετͰϨεϙϯεϘσΟ͸αΠζ͕େ͖͍
    wϝϞϦ(#࢖ͬͯΔΦϫλ
    wNVONBQ͕ࢧ഑తͰճ਺΋ଟ͍͜ͱ͔ΒɺϝϞϦͷ֬อɺղ์͕ଟ
    ͍ͷͰ͸ͳ͍͔ʁ
    wNSC@TUS@QMVT͕ࢧ഑తͰ͋Δ͜ͱ͔Βɺจࣈྻ݁߹͕ଟ͍͜ͱ͕ݪ
    ҼͬΆ͍ͳʁ NSC@TUS@QMVTSVCZFbDlBzlCz`
    

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20. ΧΫΧΫ
    γΧδΧ
    

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21. ݪҼ͸)551ϦΫΤετͷόοϑΝαΠζ
    IUUQTHJUIVCDPNNBUTVNPUPSZNSVCZTJNQMFIUUQQVMM
    NSVCZ
    DMJFOU "1*4FSWFS
    SFTPVSDFFYBNQMF
    +40/
    ιέοτ͔Β+40/Λड͚औΔࡍͷόοϑΝαΠζ͕CZUFͰ͋ͬͨ͜ͱ͔Βɺ
    ಡࠐͷϧʔϓճ਺͕ଟ͘ͳ͍ͬͯͨɻόοϑΝͷαΠζΛCZUF΁มߋ͢Δ͜ͱͰ
    ݁Ռͱͯ͠ϧʔϓճ਺ΛݮΒͯ͠จࣈྻ݁߹ͷճ਺ΛݮΒͨ͠
    
    
    
    
    
    
    

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22. NSVCZTJNQMFIUUQ
    while (t = socket.read(1024))
    if block_given?
    yield t
    next
    end
    ɹ #όοϑΝ͕গͳ͍ͱϧʔϓճ਺͕૿͑ͯɺ݁߹ճ਺͕૿͑ͯແବʹϝϞϦ֬อ
    response_text += t
    end
    ͔͠΋ɺ($͕૸Δ·Ͱ͸։์͞Εͳ͍
    

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23. ΋͏Ұา
    ౿ΈࠐΉ
    

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24. NSC@TUS@QMVT
    NSVCZͰ͸จࣈྻ݁߹ͷࡍʹ݁߹݁Ռจࣈྻͷ
    ϝϞϦΛ֬อ͢Δ
    

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25. NSVCZTJNQMFIUUQ
    while (t = socket.read(1024))
    if block_given?
    yield t
    next
    end
    response_text << t
    end
    ͞ΒʹDPODBUʹ͢Δ͜ͱͰɺແବͳྖҬ֬อΛ΍ΊΔ
    

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26. NSC@TUS@QMVT74NSC@TUS@DBU
    TUSJOHlBCz
    TUSJOHlBz TUSJOHlCz
    TUSJOHlBz TUSJOHlCz
    
    TUSJOHlBz TUSJOHlCz
    TUSJOHlBCz
    
    

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27. IUUQTUFOTOBQPODPNBSDIJWFT
    

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28. ·ͱΊ
    wϓϩϑΝΠϥ΍ίϚϯυΛར༻ͯ͠৘ใΛूΊΑ͏
    wूΊͨ৘ใ͔ΒԾઆΛཱͯΑ͏
    wԾઆΛݕূ͠Α͏
    wσόοάίʔυͰ͋Ε͜Εࢼ͢
    wਂ͘ίʔυΛಡΉɺ࣮૷ʹഭΔ
    

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29. 5IBOLZPV
    ࠷৽ͷ࠾༻৘ใΛνΣοΫˠ !QC@SFDSVJU
    

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