On 18/07/2021 17:44, Deshmukh, Kedar wrote:

We are in process of assessing HTTP/2 protocol for our Web applications as 
there are lot of benefits it provides over HTTP/1.1 at least theoretically. 
With given settings in tomcat, we are able to switch to HTTP/2 without trouble. 
For us next step is to see what benefits do we get over HTTP/1.1. Certain tools 
we generally used for web application load testing for e.g. jmeter. But, looks 
like most of the tools are not yet fully compliant with HTTP/2.

As I am subscribed to tomcat-dev group, I can see Tomcat team is putting lot of 
efforts on HTTP/2 support.
Now we would like to know,
Does tomcat dev team perform any assessment associated with these protocols ?

Protocols? You only mentioned HTTP/2.

We ran h2spec a lot during the development phase and run it occasionally now.

Are there any existing utility within tomcat to see any benefits ?


Any stats available in tomcat ?

9.0.40, 8.5.60 and 10.0.0-M10 added request statistics (accessible via JMX) for HTTP/2, WebSocket and HTTP/1.1 upgraded connections.

Any third party tool to assess performance of HTTP/2 over HTTP/1.1 ?

There is an HTTP/2 extension available for JMeter. I've used it several times to investigate HTTP/2 related bugs.

Generally, for what kind of application you would suggest HTTP/2 over HTTP/1.1 ?

One that has lots of small resources per page.


This information will really help us to take decision to move to HTTP/2 with 
more confidence.


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