What is Performance in software?
The measure of how efficiently a system responds, processes data, and uses resources under given conditions.
Definition
Performance in software refers to the measure of how efficiently a system responds to user actions, processes data, and uses resources (CPU, memory, network) under given conditions.
Key Metrics
- Response Time -- How fast the system responds to a request
- Throughput -- Number of operations processed per unit of time
- Latency -- Delay between a request and the start of a response
- Resource Utilization -- How efficiently CPU, memory, and network are used
Why It Matters
Poor performance directly impacts user experience, conversion rates, and revenue. Studies show that a 1-second delay in page load time can reduce conversions by 7%.
Practical Example
A web application takes 5 seconds to load. After profiling, the team identifies unoptimized database queries and large uncompressed images. By adding indexes and using image compression, they reduce load time to 1.2 seconds, improving user retention by 25%.
Optimization Approaches
- Code profiling and optimization
- Caching strategies (CDN, in-memory, browser)
- Database query optimization
- Lazy loading and code splitting
- Performance monitoring and alerting
Want to learn more?
If you'd like to go deeper into Performance —or bring this kind of training to your team— let's talk. I help teams understand and apply these concepts. I'd love to hear from you!
What does CI mean?
Continuous Integration (CI) is a software development practice where develo...
What is the Definition of Done?
The Definition of Done, DoD, is a set of criteria that determines when a us...
What is a tester?
A tester, also known as a test engineer or QA (Quality Assurance), is prima...
What does QA mean?
Quality Assurance (QA) is the systematic process of ensuring that software...
What is Testing?
Testing, or test, is a procedure conducted to verify and validate the funct...