A New Type of PHP:
HHVM and Hack
Jeremy Mikola
jmikola
HHVM
The Elephant in the Room
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It’s had a role in significant projects
- Wikipedia, Drupal, Wordpress
- Facebook: x * 10⁵ files, y * 10⁷ LOC
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It gets some things right
- Developer workflow: tight feedback loop
- State: each request is a blank slate
- Concurrency: share nothing
Lifetime of a Request
Bytecode Interpreter
Native Code JIT
Repo Authoritative
Pre-compile HHBC: hhvm --hphp -t analyze
Benchmarking HHVM
Small Responses (7 KB)
Requests / Second
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Response Time (ms)
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Medium Responses (80 KB)
Requests / Second
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Response Time (ms)
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Large Responses (220 KB)
Requests / Second
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Response Time (ms)
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Installing HHVM
Grab a Snickers…
Hack
<?hh
Wonderful World of Types
Stop (ab)Using PHP Arrays
These May Be Useful, Too
Extending HHVM
Getting the Community on Board
