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Add performance notes to README.

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Sergio Benitez 2016-12-15 17:19:23 -08:00
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@ -109,3 +109,54 @@ code you contribute must be:
* **Focused:** Your code should do what it's supposed to do and nothing more. * **Focused:** Your code should do what it's supposed to do and nothing more.
All pull requests are code reviewed and tested by the CI. All pull requests are code reviewed and tested by the CI.
## Performance
Rocket is designed to be performant. At this time, its performance is
[bottlenecked by the Hyper HTTP
library](https://github.com/SergioBenitez/Rocket/issues/17). Even so, Rocket
currently performs _better_ than the latest version of Hyper on a simple "Hello,
world!" benchmark:
**Machine Specs:**
* **Logical Cores:** 12 (6 cores x 2 threads)
* **Memory:** 24gb ECC DDR3 @ 1600mhz
* **Processor:** Intel Xeon X5675 @ 3.07GHz
* **Operating System:** Mac OS X v10.11.6
**Hyper v0.10.0-a.0** (46 LOC) results (best of 3, +/- 300 req/s, +/- 1us):
Running 10s test @ http://localhost:3000
2 threads and 10 connections
Thread Stats Avg Stdev Max +/- Stdev
Latency 177.61us 37.04us 1.77ms 78.55%
Req/Sec 27.56k 1.07k 30.37k 69.31%
553567 requests in 10.10s, 77.08MB read
Requests/sec: 54811.36
Transfer/sec: 7.63MB
**Rocket v0.0.11** (8 LOC) results (best of 3, +/- 200 req/s, +/- 0.5us):
Running 10s test @ http://localhost:80
2 threads and 10 connections
Thread Stats Avg Stdev Max +/- Stdev
Latency 170.07us 28.02us 484.00us 72.50%
Req/Sec 28.55k 830.36 30.43k 69.80%
574017 requests in 10.10s, 79.92MB read
Requests/sec: 56836.22
Transfer/sec: 7.91MB
**Summary:**
* Rocket throughput higher by 3.7% (higher is better)
* Rocket latency lower by 4.0% (lower is better)
## Future Improvements
Rocket is currently built on a synchronous HTTP backend. Once the Rust
aynchronous I/O libraries have stabalized, a migration to a new, more performant
HTTP backend is planned. We expect performance to improve significantly at that
time. The [Stabilize HTTP
Library](https://github.com/SergioBenitez/Rocket/issues/17) issue tracks the
progress on this front.