I work for a large health care company. They got on the JS bandwagon a while ago. We used to have huge sites that loaded fairly quickly (under 2 seconds) and cleanly. Now? The last two years doing accessibility work - a lot of these same sites which have been converted to Angular or React? They're taking in excess of 15-20+ seconds to load.
15-20+ seconds!!! What on earth are they doing to make it take that long? The React app at my last job was taking 2-4 seconds to load I joined the company (which I considered incredibly slow) and I had it at under a second by the time I left.
We did actually test on older machines too, but the machine didn’t make a huge difference in this case, because it was network requests making it slow not JS execution.
Aye, the network is also superb at work... I don't have stats but it won't surprise me if the typical user is on 4G/3G and half of those people will always browse to your site at just the time when they're in an area of poor connectivity (e.g. that may simply be how it is at their home).
I work for a large health care company. They got on the JS bandwagon a while ago. We used to have huge sites that loaded fairly quickly (under 2 seconds) and cleanly. Now? The last two years doing accessibility work - a lot of these same sites which have been converted to Angular or React? They're taking in excess of 15-20+ seconds to load.