Get Key Insights on API Performance Testing - QASource

Written by QASource | Jan 15, 2020 5:00:00 PM

“The bitterness of poor quality remains long after the sweetness of low price is forgotten.”

- Benjamin Franklin

Growth in Web APIs Since 2005

Why API Performance Testing Is Required

APIs enable interaction among applications. Slowness in any of the API will have an impact on all the involved integrated applications.

For instance, slowness in third party payment APIs will slow down the purchase process.

Hence, all APIs should meet the benchmark to avoid any slowness.

API Performance Testing in 5 Steps

CI Performance Test Cycle

Do's
- Test all APIs like Rest, SOAP, and GraphQL
- Parameterize variables
- Test end-to-end API workflow
- Performance test APIs in every release
- Use FlowTracer to monitor all requests
- Keep third party in sync during a test run
- Ensure third party APIs meet product benchmark

Don'ts
- Inappropriate Think Time
- Illogical ramp-up time
- The test completes before all users ramp-up
- Lack of assertions
- Overloaded load generator machine
- Network latency is ignored

Tips and Tricks

Include all applicable API methods in test scope
Use inbuilt functions for token key encryption
Post respective header information along with each API request
Call back asynchronous API to validate a response
Use sniffing tools to compose API request, if required
Cleanse encoded key value to avoid failures
Expect more load for Open APIs than Partner APIs
More bandwidth is required for SOAP XML request type

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