Introduction To Phoenix Web Framework from Elixir

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Riza Fahmi - ElixirDose.com - @rizafahmi22 - riza@ hacktiv8.com PRODUCTIVE. RELIABLE. FAST.

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SPONSOR THANKS!

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INTRODUCTION YOU’RE MY REGULATOR, MY COMPILER ▸ Scream when things go too fast / slow / are unclear ▸ Scream when cool things happen ▸ Help me when live coding, I’m suck at it. Find errors for me before the compiler do ▸ Similar to Phoenix channel, this is two way communication channel. Don’t let me do all the talking!

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INTRODUCTION SLIDES ARE UP! https://slideshare.net

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INTRODUCTION WHO AM I ▸ Was at CitizenLab, a Belgium-based early stage startup. As a CTO ▸ Now at Hacktiv8, a startup for dev bootcamp ▸ Run ElixirDose — an Elixir-focused blog since November 2013

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INTRODUCTION WHAT WE’LL SEE ▸ The Awesomeness of Phoenix ▸ Build something with Phoenix ▸ Some live coding

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SOME GLOSSARY Web Framework Programming Language Erlang Virtual Machine

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WHAT IS PHOENIX

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“Framework for building HTML5 apps, API backends and distributed systems to take on the modern web.” Chris McCord

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HOW IS PHOENIX DIFFERENT?

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PRODUCTIVITY PERFORMANCE VS

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LET’S TALK PRODUCTIVITY

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PRODUCTIVITY SHORT TERM ▸ Documentation / Guides / Generators ▸ Eliminates trivial choices

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PRODUCTIVITY LONG TERM ▸ Maintainability ▸ Tried and true architecture patterns ▸ Let it crash mentality

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“IF I HAVE TO BUILD SKYNET, KILLER ARTIFICIAL INTELLIGENT FROM TERMINATOR MOVIES, I WOULD USE ERLANG AND ERLANG VM. MOSTLY BECAUSE IT’S UNKILLABLE AND KEEP COMING BACK!” Simon St.Laurent from MostlyErlang Podcast

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MORE FEATURES PLEASE…

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FEATURES STATIC BUILD TOOLS WITH ES6 AS DEFAULT Ultra fast HTML5 build tools Compiles/lints your scripts and styles Concatenates your scripts and styles Miniﬁes it Watches for ﬁle changes

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FEATURES PRETTY AND HELPFUL ERROR PAGES

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FEATURES CHANNELS ▸ The main reason why Phoenix exists in the ﬁrst place ▸ It’s websocket with steroid ▸ Cross-platform, cross-languages ▸ For creating modern, real-time apps ▸ Beyond HTML

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FEATURES MORE… ▸ Form builder ▸ Live reloading ▸ MCV with twist ▸ much more…

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LET’S TALK PERFORMANCE NOW

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PERFORMANCE VIEWS & TEMPLATES ▸ Precompiled and pretty fast! ▸ Views render templates ▸ It’s beyond HTML

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PERFORMANCE WHAT ABOUT SOME BENCHMARK Frameworks Throughput (req/s) Latency (ms) Plug (Elixir) 54,948.14 3.83 Gin (Go) 51,483.20 1.94 Phoenix (Elixir) 43,063.45 2.82 Express Cluster (Nodejs) 27,669.46 3.73 Martini (Go) 14,798.46 6.81 Express (Nodejs) 9,965.56 10.07 Sinatra (Ruby) 9,182.86 6.55 Rails (Ruby) 3,274.81 17.25 https://github.com/mroth/phoenix-showdown

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PERFORMANCE ROBUST CONCURRENCY MODEL ▸ “processes” is extremely lightweight units of concurrency ▸ Garbage collection is per process, no global pauses

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“ WE DO NOT HAVE ONE WEB-SERVER HANDLING 2 MILLIONS SESSIONS. WE HAVE 2 MILLION WEBSERVERS HANDLING ONE SESSION EACH.” Joe Armstrong - Erlang Father http://goo.gl/DprVTC

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LET’S BUILD SOMETHING

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WHAT WE’LL BUILD ELIXIR VIDEO PORTAL ▸ CRUD app for collecting Elixir-related video ▸ Similar confreaks.tv or pyvideo.org