Currently Viewing Posts Tagged SPDY

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



Continue reading “HTTP/2 vs SPDY 3.1”

Shall I enable SPDY on SSL?

I have some sites with SSL enabled only. These sites are money related or security related. So SSL is a must have.

Now the question came to my head and it is Do I need to add SPDY on it?

Let me review the basic information of SPDY.

SPDY is an experiment with protocols for the web.  Its goal is to reduce the latency of web pages.

Here is the official page of this project:

SPDY Goal:

The SPDY project defines and implements an application-layer protocol for the web which greatly reduces latency. The high-level goals for SPDY are:
  • To target a 50% reduction in page load time. Our preliminary results have come close to this target (see below).
  • To minimize deployment complexity. SPDY uses TCP as the underlying transport layer, so requires no changes to existing networking infrastructure.  
  • To avoid the need for any changes to content by website authors. The only changes required to support SPDY are in the client user agent and web server applications.
  • To bring together like-minded parties interested in exploring protocols as a way of solving the latency problem. We hope to develop this new protocol in partnership with the open-source community and industry specialists.

I like it. Reduce page load time.


SPDY adds a session layer atop of SSL that allows for multiple concurrent, interleaved streams over a single TCP connection.

The usual HTTP GET and POST message formats remain the same; however, SPDY specifies a new framing format for encoding and transmitting the data over the wire.


If I have https, or SSL enabled web-site, I just need to add SPDY on top of it. That is it.

Continue reading “Shall I enable SPDY on SSL?”

  • Archives