We compared the speed at which different web servers and caching platforms respond to requests for small ESI scripts using both non-keep-alive and keep-alive connections.
Summary
LiteSpeed Enterprise Performance Gain
| Concurrent Users | Keep-Alive | Apache / Varnish |
|---|---|---|
| 10 | No | 2.9x |
| Yes | 3.2x | |
| 100 | No | 2.5x |
| Yes | 2.9x |
Notes:
- We used a simple ESI script that had 'Hello' in the first file and 'World!' in the included file. We used such a tiny script to avoid saturating the network connection and to show raw speed differences between the different setups.
- The benchmark simulated serving 10000 requests to 10 and 100 users.
- The test was performed over a 10GBps network connection to make sure network bandwidth did not become a bottleneck.
Test Enviorment
Software:
LiteSpeed Enterprise 5.1.13 Apache 2.4.25 PHP 7.1.2 cPanel 62 Varnish 4.1.5
Server hardware specs:
Intel Xeon X5660 Single Core @ 2.80GHz 2GB RAM 50GB HDD CloudLinux 7.3
Client hardware specs:
Intel Xeon E5-1620 Dual Core @ 3.60GHz 2GB RAM CentOS 6.8 with OpenVZ kernel 2.6.32-042stab116.1 Intel X540 10GBASE-T on board NIC
Network Switch:
Netgear XS708E-100NES 8-ports 10G switch