3 ms·
The improvements in JS performance over time is crazy. I was an Opera user (started with 5.x IIRC) and its JS engine was pretty slow. I mean so slow that even
by fps_doug 7y ago
The improvements in JS performance over time is crazy.
I was an Opera user (started with 5.x IIRC) and its JS engine was pretty slow. I mean so slow that even in the early 2000s some pages with just a few animations were annoying to use and better viewed in IE.
Then at some point they rewrote the engine from scratch and also implemented JIT compilation to machine code. Opera might even have been the first browser to do so. After that it was lightning fast, ahead of IE, Firefox and Chrome before Blink/V8. If you use the last Presto Build of Opera today, those pages that still manage to render at all and use heavy JS are painfully sluggish, close to unusable.
Opera's JS engine rewrite felt like performance was suddenly IE times 10. Now it feels like Chrome/Firefox are Opera Presto times 100.