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Notes

Notes read top (most recent)

hotel room runthrough

  • 10m hot features
  • 20m to demo'ing CFG
  • 28m behind scenes
  • 52m to Q flowed well, needs more practice on the demo part

Third runthru at home 55m

  • Timeline
    • 12m to "Hot Features"
    • 31m to "Behind Scenes"
    • 55m to Qs
  • Went well

Second CppCon runthrough at work (1h40

  • Audience didn't know much about C++ or the site, so took longer
  • BUT still skipped over favourite opts....so...culled them
  • Need to roll some good optimisation examples into the "what's hot"
  • Steer -> show conformance view

First CppCon runthrough at home (1h5)

  • Timeline
    • 10m to "2018"
    • 18m was fiddling with llcm-mca
    • roughly 30m to end of CE demo
    • 44m to "summation"
      • dropped summation and devirtualisation
    • Behind the scenes took til 1.05, with improv'd isolation talk
  • TODO
    • FINALISE WHAT GOES INTO DEMO AND MAKE SHORT LINKS
      • Rust vs c++ "square"
      • demos languages, diff mode, window mgmt -- DONE
      • Load up sum optimised:
        • llvm-mca demo; llvm tool -- DONE
      • info on ASM ctrl-f10
      • code higlighting ctrl-f10 toggle
      • show:
        • CFG
        • clang opt view, ast
        • gcc pass view
      • #include <url>
    • Install and get working locally:
      • llvm-mca "analysis" -- DONE
      • clang-tidy -- DONE
    • Decide whether to drop whole "favourite optimisations", or only use them to show things above.
      • used divide to show off llvm-mca...
    • Write "how sandboxing works" slide(s) -- DONE (ish)

Readying for CppCon

  • update stats for up-to-date - done
  • add a section on "power features of CE":
    • execution, new pane as well as normal
    • Herb surprised by #include URL and mouse-over asm

So, what features to showcase?

  • multiview, stacking windows?
  • diff view
  • pahole
  • llvm-mca
  • mouse over
  • #include URLs
  • GCC and clang tree/RTL viewer
  • other languages

From first presentation April 2019

Raw form notes below...

  • Stats

  • when did it get renamed compiler explorer?

  • Show tools behind the scenes

    • AWS
    • ce
    • stathat
    • papertrail
    • sentry

  • Show docker stuff

  • Show daily compiler build

  • Show daily trunk update

  • Terraform

  • PRs for adding stuff

  • EFS stuff

  • Hacking attempts

    • Why "execution support" has been Coming Soon™ for so long

  • Outages

    • EFS transfer limit (May 2017) post OS upgrade
    • S3 outage (Feb 2017)

  • Little known stuff

    • Tool windows
      • Show llvm mca
    • LLVM IR
    • CE API mode -- count compilers example?

  • cost

  • Top 5 Favourite compiler optimisations

    1. POPCNT
    2. constant-time sum
    3. isspc
    4. divide -> multiply
    5. ???

Conclusion

  • Community

  • Thanks to

    • Rubén
    • Partouf
    • Chedy
    • Jared
    • Patreons!

  • THE FUTURE