HTTP/2 vs SPDY 3.1

I have a web site, which was powered by Nginx 1.7. The SPDY 3.1 was enabled. Later last week, I upgraded it to Nginx 1.9.7 mainline version.

HTTP/2 already built with Nginx from version 1.9.5.  Why not enable HTTP/2?

I just did a very rough test.

1. Pingdom testing tool

SPDY 3.1: Performance Grade 97/100, 18 request,  load time 3.17s

HTTP/2: 97/100 18 request,  867ms

2. GTmetrix

SPDY 3.1: Pagespeed score A 98%, YSlow score A 95%, Pageload 1.0s,

HTTP/2: Pagespeed score A 98%, YSlow score A 95%, Pageload time 0.6s

3. Webpagetest

SPDY 3.1: Grade F A A n/a C Check

HTTP/2:

Ref: Nginx HTTP/2 module

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