Because the JSON grammar is much simpler than JavaScript’s grammar, JSON can be parsed more efficiently than JavaScript.
Instead of inlining the data as a JavaScript object literal, like so:
const data = { foo: 42, bar: 1337 }; // 🐌
…it can be represented in JSON-stringified form, and then JSON-parsed at runtime:
const data = JSON.parse('{"foo":42,"bar":1337}'); // 🚀
As long as the JSON string is only evaluated once, the JSON.parse approach is much faster compared to the JavaScript object literal, especially for cold loads.
dvas0004
commented
5 years ago
Because the JSON grammar is much simpler than JavaScript’s grammar, JSON can be parsed more efficiently than JavaScript.
Instead of inlining the data as a JavaScript object literal, like so:
…it can be represented in JSON-stringified form, and then JSON-parsed at runtime:
As long as the JSON string is only evaluated once, the
JSON.parseapproach is much faster compared to the JavaScript object literal, especially for cold loads.