Simple Benchmark for als-context, cls-hooked & AsyncLocalStorage

Steps

1. npm install

2. node server.js for baseline

   node server-cls.js for cls-hooked

   node server-als.js for native AsyncLocalStorage

   node server-alscontext.js for cls part of alscontext here

3. node index.js

Note: Micro benchmarking is not representative of real world situation

Performance: AsyncLocalStorage > cls-context > cls-hooked

Using request to pass context

Running 10s test 10 connections

Stat	2.5%	50%	97.5%	99%	Avg	Stdev	Max
Latency	1ms	1ms	3ms	3ms	1.13ms	0.54ms	21ms

Stat	1%	2.5%	50%	97.5%	Avg	Stdev	Min
Req/Sec	3817	3817	6855	7047	6514.64	898.63	3817
Bytes/Sec	1 MB	1 MB	1.8 MB	1.85 MB	1.71MB	235kB	1 MB

Req/Bytes counts sampled once per second.

72k requests in 11.03s, 18.8 MB read

Using AsyncLocalStorage to pass context

Running 10s test @ http://localhost:3000 10 connections

Stat	2.5%	50%	97.5%	99%	Avg	Stdev	Max
Latency	1ms	1ms	3ms	3ms	1.1ms	0.48ms	22ms

Stat	1%	2.5%	50%	97.5%	Avg	Stdev	Min
Req/Sec	3837	3837	7211	7371	6815.73	991.78	3836
Bytes/Sec	1.01 MB	1.01 MB	1.89 MB	1.93 MB	1.79 MB	260 kB	1.01 MB

Req/Bytes counts sampled once per second.

75k requests in 11.02s, 19.6 MB read

Using alscontext (CLS part) to pass context

Running 10s test @ http://localhost:3000 10 connections

Stat	2.5%	50%	97.5%	99%	Avg	Stdev	Max
Latency	1ms	1ms	3ms	4ms	1.2ms	0.69ms	26ms

Stat	1%	2.5%	50%	97.5%	Avg	Stdev	Min
Req/Sec	3077	3077	6455	6719	5991.10	1096.3	3077
Bytes/Sec	806 kB	806 kB	1.69 MB	1.76 MB	1.57 MB	287 kB	806 kB

Req/Bytes counts sampled once per second.

60k requests in 10.02s, 15.7 MB read

Using cls-hooked to pass context

Running 10s test @ http://localhost:3000 10 connections

Stat	2.5%	50%	97.5%	99%	Avg	Stdev	Max
Latency	1ms	2ms	5ms	6ms	2.22ms	0.97ms	36ms

Stat	1%	2.5%	50%	97.5%	Avg	Stdev	Min
Req/Sec	2173	2173	4171	4227	3893.82	597.54	2431
Bytes/Sec	569 kB	569 kB	1.09 MB	1.11 MB	1.02 MB	157 kB	569 kB

Req/Bytes counts sampled once per second.

43k requests in 11.03s, 11.2 MB read