Browsers impose a per-domain limit of 6-8 connections when using HTTP/1.1, depending on the browser implementation. This allows at most 6-8 concurrent requests per domain. With HTTP/2, browsers open only 1 connection per domain. However, thanks to the multiplexing feature of the HTTP/2 protocol, the number of concurrent requests per domain is not limited to … Read more
var express = require(‘express’); var app = express(); app.get(“https://stackoverflow.com/”, function (req, res) { res.send(‘hello, http2!’); }); var options = { key: fs.readFileSync(‘./example/localhost.key’), cert: fs.readFileSync(‘./example/localhost.crt’) }; require(‘http2’).createServer(options, app).listen(8080); EDIT This code snippet was taken from a conversation on Github.
In general, the biggest immediate benefit of HTTP/2 is the speed increase offered by multiplexing for the browser connections which are often hampered by high latency (i.e. slow round trip speed). These also reduce the need (and expense) of multiple connections which is a work around to try to achieve similar performance benefits in HTTP/1.1. … Read more
gRPC is not really the relevant part for comparison, it’s that gRPC uses HTTP/2 which can certainly be compared to WebSockets. https://www.infoq.com/articles/websocket-and-http2-coexist This article outlines them quite well. Essentially, HTTP/2 is Client/Server with Server Push on the background, so you can make your request and simply stay on that connection listening for updates without the … Read more
You can just check it in: Chrome Dev Tool (F12) → Network → Protocol. It will tell you the protocol used and the domain of each transfer. Legend http/1.1 = HTTP/1.1 h2 = HTTP/2 Note: If you cannot see the Protocol column, just right-click on any header and check the “Protocol” label.
In my case it was – no disk space left on the web server.
Put simply, multiplexing allows your Browser to fire off multiple requests at once on the same connection and receive the requests back in any order. And now for the much more complicated answer… When you load a web page, it downloads the HTML page, it sees it needs some CSS, some JavaScript, a load of … Read more
HTTP/2 supports queries multiplexing, headers compression, priority and more intelligent packet streaming management. This results in reduced latency and accelerates content download on modern web pages. More details here.
After just getting finished reading RFC 7540, HTTP/2 does obsolete websockets for all use cases except for pushing binary data from the server to a JS webclient. HTTP/2 fully supports binary bidi streaming (read on), but browser JS doesn’t have an API for consuming binary data frames and AFAIK such an API is not planned. … Read more