(de)optimization) exercise

Observe a deoptimization

run node --trace-opt --trace-deopt 1deopt.js and see a clean example of single deoptimization.

In real life it's much less readable ;)

Testing if a function can be optimized

testing.js has some examples of functions that can prevent optimization. Run node testing.js and see how they do in different versions of node.

use n npm install -g n or get nvm to switch node versions.

Try optimizing a function

fixable.js is a module with a trivial parser, but it has a few issues preventing optimization.

Try fixing the optimization issues without breaking any functionality. Run npm test to verify if you succeeded.

test/spoilers/fixed.js contains a solution