API Performance
Overview
APIs can be made faster and more reliable by using caching and quotas. These help reduce backend load and control traffic.
| Action | Purpose | Description |
|---|---|---|
| Use caching | Speed up responses | Stores API responses so repeated requests do not hit the backend, reducing load and improving response time. |
| Apply quotas | Control usage | Limits how often APIs can be called to prevent abuse and manage resource usage. |
| Monitor performance | Track metrics | Measures latency, cache efficiency, and traffic patterns to identify improvements and optimize API performance. |
Response Caching
Caching improves speed by reusing previous responses.
- Store responses for repeated requests
- Reduce backend calls
- Improve response time
When the same request is made multiple times, the cached response is returned instead of calling the backend again. This reduces processing time and improves performance. Caching ensures faster and more efficient API responses.
The caching behavior can also be customized based on requirements.
- Set cache duration
- Vary by query or headers
- Choose cache location
You can define how long responses stay in cache and whether different inputs create separate cache entries. The cache can be stored at the gateway or in external systems like Redis.
Traffic Spikes and Quotas
APIs must be protected from sudden high traffic, which can slow down the system, increase resource costs, or even cause outages. Managing traffic ensures APIs remain available and stable under load.
- Prevent system slowdown
- Avoid high resource costs
- Protect against overload
Quotas work alongside traffic management by limiting how often clients can call the API within a set time period.
- Set request limits over time
- Prevent excessive usage
- Protect backend systems
- Ensures controlled access
Monitoring Performance
Monitoring and tracking metrics help fine-tune caching and quotas to improve API performance.
- Measure latency
- Track cache usage
- Identify high traffic endpoints
Tools like Application Insights provide data on API behavior. For example, if an endpoint has low cache usage but high traffic, increasing cache duration can improve performance.
