HTTP/2 is a major revision of the hypertext transfer protocol (HTTP) used in the World Wide Web. The protocol was derived from an experimental protocol named SPDY, introduced by Google, before it was published as RFC 7540 in 2015.
When designing HTTP/2, the inventors put their focus on efficiency. For that reason, the protocol offers a series of improvements over HTTP/1.1:
The Silk Performer HTTP/2 support is disabled by default. You can enable and configure HTTP/2 in the Profile Settings: Click .
Currently, Silk Performer supports HTTP/2 for replay only. Scripts recorded using HTTP/1.1 will replay correctly with HTTP/2 unless the server returns specific content that depends on the HTTP version the client uses.
The Silk Performer Recorder does not allow a browser to use HTTP/2, thus HTTP 1.1 is used. In most cases, this does not affect the recorded traffic and content. If, however, the server returns different content depending on the HTTP version used for communication, the HTTP/2 content cannot be recorded.