Mac or Linux server has pre-installed Apache Bench which we can use for load testing for free. I am not sure about the limitation, but from my machine (Macbook Pro 2015), I can do load testing up to 200 concurrent connections.
We can simply run this command in terminal
ab -n 100 -c 10 http://www.yahoo.com/
100 is total connections we will test, and 10 is the maximum concurrent we will test.
The report will be produced once it is completed.
Concurrency Level: 10
Time taken for tests: 1.889 seconds
Complete requests: 100
Failed requests: 0
Write errors: 0
Total transferred: 1003100 bytes
HTML transferred: 949000 bytes
Requests per second: 52.94 [#/sec] (mean)
Time per request: 188.883 [ms] (mean)
Time per request: 18.888 [ms] (mean, across all concurrent requests)
Transfer rate: 518.62 [Kbytes/sec] received
Connection Times (ms)
min mean[+/-sd] median max
Connect: 57 59 1.7 59 64
Processing: 117 126 7.5 124 162
Waiting: 57 62 7.0 60 98
Total: 175 186 8.0 184 224
Percentage of the requests served within a certain time (ms)
50% 184
66% 186
75% 187
80% 188
90% 192
95% 203
98% 216
99% 224
100% 224 (longest request)
Reference: https://www.petefreitag.com/item/689.cfm
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