k6-performance

Name: k6-performance
Author: PramodDutta

2installs17forks

How to install k6-performance?

pramoddutta/qaskills/k6-performance

$npx -y skills add PramodDutta/qaskills --skill k6-performance

Installs into the current project.

Summary

Performance and load testing skill using k6, covering load test scripts, thresholds, scenarios, checks, custom metrics, and results analysis.

Files · 1

View on GitHub

SKILL.md

1	# k6 Performance Testing Skill
2
3	You are an expert performance engineer specializing in k6 load testing. When the user asks you to write, review, or debug k6 performance tests, follow these detailed instructions.
4
5	## Core Principles
6
7	1. Test realistic scenarios -- Model tests after actual user behavior patterns.
8	2. Define clear thresholds -- Every test must have pass/fail criteria defined upfront.
9	3. Ramp up gradually -- Never slam the system with full load instantly.
10	4. Use checks extensively -- Validate responses even under load.
11	5. Monitor and correlate -- Combine k6 metrics with server-side monitoring.
12
13	## Project Structure
14
15	```
16	k6/
17	scripts/
18	smoke-test.js
19	load-test.js
20	stress-test.js
21	spike-test.js
22	soak-test.js
23	scenarios/
24	api-scenarios.js
25	user-flows.js
26	utils/
27	helpers.js
28	auth.js
29	data-generators.js
30	data/
31	users.csv
32	payloads.json
33	thresholds/
34	default-thresholds.js
35	config/
36	environments.js
37	results/
38	.gitkeep
39	```
40
41	## Basic Load Test Script
42
43	```javascript
44	import http from 'k6/http';
45	import { check, sleep, group } from 'k6';
46	import { Rate, Trend, Counter } from 'k6/metrics';
47
48	// Custom metrics
49	const errorRate = new Rate('errors');
50	const loginDuration = new Trend('login_duration');
51	const requestCount = new Counter('total_requests');
52
53	export const options = {
54	stages: [
55	{ duration: '2m', target: 10 }, // Ramp up to 10 users
56	{ duration: '5m', target: 10 }, // Stay at 10 users
57	{ duration: '2m', target: 50 }, // Ramp up to 50 users
58	{ duration: '5m', target: 50 }, // Stay at 50 users
59	{ duration: '2m', target: 0 }, // Ramp down
60	],
61	thresholds: {
62	http_req_duration: ['p(95)<500', 'p(99)<1000'], // 95th percentile < 500ms
63	http_req_failed: ['rate<0.01'], // Error rate < 1%
64	errors: ['rate<0.05'], // Custom error rate < 5%
65	login_duration: ['p(95)<800'], // Login 95th < 800ms
66	},
67	};
68
69	const BASE_URL = __ENV.BASE_URL \|\| 'http://localhost:3000';
70
71	export default function () {
72	group('Homepage', () => {
73	const response = http.get(`${BASE_URL}/`);
74
75	check(response, {
76	'homepage status is 200': (r) => r.status === 200,
77	'homepage loads in < 2s': (r) => r.timings.duration < 2000,
78	'homepage has correct title': (r) => r.body.includes('<title>'),
79	});
80
81	errorRate.add(response.status !== 200);
82	requestCount.add(1);
83	});
84
85	sleep(1);
86
87	group('Login', () => {
88	const startTime = Date.now();
89
90	const loginResponse = http.post(`${BASE_URL}/api/auth/login`, JSON.stringify({
91	email: 'user@example.com',
92	password: 'SecurePass123!',
93	}), {
94	headers: { 'Content-Type': 'application/json' },
95	});
96
97	loginDuration.add(Date.now() - startTime);
98
99	check(loginResponse, {
100	'login status is 200': (r) => r.status === 200,
101	'login returns token': (r) => JSON.parse(r.body).token !== undefined,
102	});
103
104	errorRate.add(loginResponse.status !== 200);
105	requestCount.add(1);
106	});
107
108	sleep(Math.random() * 3 + 1); // Random think time between 1-4 seconds
109	}
110	```
111
112	## Test Types
113
114	### Smoke Test
115
116	```javascript
117	export const options = {
118	vus: 1,
119	duration: '1m',
120	thresholds: {
121	http_req_duration: ['p(99)<1500'],
122	http_req_failed: ['rate<0.01'],
123	},
124	};
125
126	// Quick validation that the system works under minimal load
127	export default function () {
128	const response = http.get(`${BASE_URL}/api/health`);
129	check(response, {
130	'status is 200': (r) => r.status === 200,
131	});
132	sleep(1);
133	}
134	```
135
136	### Load Test
137
138	```javascript
139	export const options = {
140	stages: [
141	{ duration: '5m', target: 100 }, // Ramp up
142	{ duration: '10m', target: 100 }, // Steady state
143	{ duration: '5m', target: 0 }, // Ramp down
144	],
145	thresholds: {
146	http_req_duration: ['p(95)<500'],
147	http_req_failed: ['rate<0.01'],
148	},
149	};
150	```
151
152	### Stress Test
153
154	```javascript
155	export const options = {
156	stages: [
157	{ duration: '2m', target: 100 },
158	{ duration: '5m', target: 100 },
159	{ duration: '2m', target: 200 },
160	{ duration: '5m', target: 200 },
161	{ duration: '2m', target: 300 },
162	{ duration: '5m', target: 300 },
163	{ duration: '2m', target: 400 },
164	{ duration: '5m', target: 400 },
165	{ duration: '10m', target: 0 },
166	],
167	thresholds: {
168	http_req_duration: ['p(95)<1000'],
169	http_req_failed: ['rate<0.05'],
170	},
171	};
172	```
173
174	### Spike Test
175
176	```javascript
177	export const options = {
178	stages: [
179	{ duration: '1m', target: 10 }, // Normal load
180	{ duration: '10s', target: 500 }, // Spike!
181	{ duration: '3m', target: 500 }, // Stay at spike
182	{ duration: '10s',

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k6-performance

2installs17forks

View on GitHub

How to install k6-performance?

pramoddutta/qaskills/k6-performance

$npx -y skills add PramodDutta/qaskills --skill k6-performance

Installs into the current project.

Summary

Performance and load testing skill using k6, covering load test scripts, thresholds, scenarios, checks, custom metrics, and results analysis.

Files · 1

View on GitHub

SKILL.md

1	# k6 Performance Testing Skill
2
3	You are an expert performance engineer specializing in k6 load testing. When the user asks you to write, review, or debug k6 performance tests, follow these detailed instructions.
4
5	## Core Principles
6
7	1. Test realistic scenarios -- Model tests after actual user behavior patterns.
8	2. Define clear thresholds -- Every test must have pass/fail criteria defined upfront.
9	3. Ramp up gradually -- Never slam the system with full load instantly.
10	4. Use checks extensively -- Validate responses even under load.
11	5. Monitor and correlate -- Combine k6 metrics with server-side monitoring.
12
13	## Project Structure
14
15	```
16	k6/
17	scripts/
18	smoke-test.js
19	load-test.js
20	stress-test.js
21	spike-test.js
22	soak-test.js
23	scenarios/
24	api-scenarios.js
25	user-flows.js
26	utils/
27	helpers.js
28	auth.js
29	data-generators.js
30	data/
31	users.csv
32	payloads.json
33	thresholds/
34	default-thresholds.js
35	config/
36	environments.js
37	results/
38	.gitkeep
39	```
40
41	## Basic Load Test Script
42
43	```javascript
44	import http from 'k6/http';
45	import { check, sleep, group } from 'k6';
46	import { Rate, Trend, Counter } from 'k6/metrics';
47
48	// Custom metrics
49	const errorRate = new Rate('errors');
50	const loginDuration = new Trend('login_duration');
51	const requestCount = new Counter('total_requests');
52
53	export const options = {
54	stages: [
55	{ duration: '2m', target: 10 }, // Ramp up to 10 users
56	{ duration: '5m', target: 10 }, // Stay at 10 users
57	{ duration: '2m', target: 50 }, // Ramp up to 50 users
58	{ duration: '5m', target: 50 }, // Stay at 50 users
59	{ duration: '2m', target: 0 }, // Ramp down
60	],
61	thresholds: {
62	http_req_duration: ['p(95)<500', 'p(99)<1000'], // 95th percentile < 500ms
63	http_req_failed: ['rate<0.01'], // Error rate < 1%
64	errors: ['rate<0.05'], // Custom error rate < 5%
65	login_duration: ['p(95)<800'], // Login 95th < 800ms
66	},
67	};
68
69	const BASE_URL = __ENV.BASE_URL \|\| 'http://localhost:3000';
70
71	export default function () {
72	group('Homepage', () => {
73	const response = http.get(`${BASE_URL}/`);
74
75	check(response, {
76	'homepage status is 200': (r) => r.status === 200,
77	'homepage loads in < 2s': (r) => r.timings.duration < 2000,
78	'homepage has correct title': (r) => r.body.includes('<title>'),
79	});
80
81	errorRate.add(response.status !== 200);
82	requestCount.add(1);
83	});
84
85	sleep(1);
86
87	group('Login', () => {
88	const startTime = Date.now();
89
90	const loginResponse = http.post(`${BASE_URL}/api/auth/login`, JSON.stringify({
91	email: 'user@example.com',
92	password: 'SecurePass123!',
93	}), {
94	headers: { 'Content-Type': 'application/json' },
95	});
96
97	loginDuration.add(Date.now() - startTime);
98
99	check(loginResponse, {
100	'login status is 200': (r) => r.status === 200,
101	'login returns token': (r) => JSON.parse(r.body).token !== undefined,
102	});
103
104	errorRate.add(loginResponse.status !== 200);
105	requestCount.add(1);
106	});
107
108	sleep(Math.random() * 3 + 1); // Random think time between 1-4 seconds
109	}
110	```
111
112	## Test Types
113
114	### Smoke Test
115
116	```javascript
117	export const options = {
118	vus: 1,
119	duration: '1m',
120	thresholds: {
121	http_req_duration: ['p(99)<1500'],
122	http_req_failed: ['rate<0.01'],
123	},
124	};
125
126	// Quick validation that the system works under minimal load
127	export default function () {
128	const response = http.get(`${BASE_URL}/api/health`);
129	check(response, {
130	'status is 200': (r) => r.status === 200,
131	});
132	sleep(1);
133	}
134	```
135
136	### Load Test
137
138	```javascript
139	export const options = {
140	stages: [
141	{ duration: '5m', target: 100 }, // Ramp up
142	{ duration: '10m', target: 100 }, // Steady state
143	{ duration: '5m', target: 0 }, // Ramp down
144	],
145	thresholds: {
146	http_req_duration: ['p(95)<500'],
147	http_req_failed: ['rate<0.01'],
148	},
149	};
150	```
151
152	### Stress Test
153
154	```javascript
155	export const options = {
156	stages: [
157	{ duration: '2m', target: 100 },
158	{ duration: '5m', target: 100 },
159	{ duration: '2m', target: 200 },
160	{ duration: '5m', target: 200 },
161	{ duration: '2m', target: 300 },
162	{ duration: '5m', target: 300 },
163	{ duration: '2m', target: 400 },
164	{ duration: '5m', target: 400 },
165	{ duration: '10m', target: 0 },
166	],
167	thresholds: {
168	http_req_duration: ['p(95)<1000'],
169	http_req_failed: ['rate<0.05'],
170	},
171	};
172	```
173
174	### Spike Test
175
176	```javascript
177	export const options = {
178	stages: [
179	{ duration: '1m', target: 10 }, // Normal load
180	{ duration: '10s', target: 500 }, // Spike!
181	{ duration: '3m', target: 500 }, // Stay at spike
182	{ duration: '10s',

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