Performance, asynchronous loading and request budgets
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Measure network and rendering separately before optimizing. Asynchronous module loading and suitable preloads reduce avoidable resource waits; selective data requests reduce payload work. A faster loading shell can still hide a slow or over-fetching business query.
Visual overview
Explanation
Tutorial outcome
Measure network and rendering separately before optimizing. Asynchronous module loading and suitable preloads reduce avoidable resource waits; selective data requests reduce payload work. A faster loading shell can still hide a slow or over-fetching business query.
Prerequisites
Complete chapters 1–13 in this module. Use synthetic fixtures or an authorized sandbox.
Worked case — fictional
A synthetic order app downloads many small resources and all historical orders before displaying ten rows.
Step-by-step investigation
1. Baseline
Record a cold-load resource waterfall, transferred bytes and time to the first usable task.
Expected evidence: Baseline fixture has 60 resource requests and 5000 orders.
2. Load
Use supported asynchronous component/dependency loading and inspect the generated preload artifact.
Expected evidence: Resources arrive through the intended preload path.
3. Select
Request only the fields and bounded result set needed for the first screen where the service supports it.
Expected evidence: The first view consumes ten orders and required properties.
4. Compare
Re-run the same scenario and confirm functional correctness, navigation and missing-resource behavior.
Expected evidence: Measured improvement does not remove required order data.
Try it yourself
Reproduce the synthetic input from the example below in a local fixture or authorized sandbox. Follow each step, record the observed result, and explain any mismatch before continuing. Do not treat the expected evidence as a result observed in your SAP tenant.
Acceptance check
The same business task is correct with a measured reduction in avoidable resources or data volume.
Common failure to avoid
Do not use unbounded prefetching, synchronous module calls or an unmeasured cache change as a performance strategy.
Self-check
Which evidence should precede a loading optimization?
Expected reasoning: A repeatable resource and business-request baseline.
Edition and release scope
Check the linked SAP documentation for your product, runtime, region and enabled service plan. The worked case is a simulation; these steps were not executed in a customer SAP tenant.
SAP references
References checked 2026-10-30. SAP material supports the named concepts; the case, fixture and acceptance checks are original ERPClimb teaching material. No SAP tenant execution or certification is claimed.
[SAP Help — UI5 developer best practices](https://help.sap.com/docs/SAPUI5/b2f662dd9d7a4ec680056733050b4d34/28fcd55b04654977b63dacbee0552712.html?version=1.143) — Asynchronous modules, components, views, fragments and dependencies; source version 1.143
Code example
{"baselineOrders":5000,"initialPageSize":10,"measure":["requests","bytes","usable-task-time"]}Loading guided workshop…
Real project scenario
A synthetic order app downloads many small resources and all historical orders before displaying ten rows.
Common mistakes
Do not use unbounded prefetching, synchronous module calls or an unmeasured cache change as a performance strategy.
Best practices
The same business task is correct with a measured reduction in avoidable resources or data volume. Check the linked SAP documentation for your product, runtime, region and enabled service plan. The worked case is a simulation; these steps were not executed in a customer SAP tenant.
Interview angle
Which evidence should precede a loading optimization? A repeatable resource and business-request baseline.
Practice this lesson
Original educational case studies for SAP consultants, not official SAP certification exam questions. Verify product edition and implementation details against the current SAP documentation.
Quick check
0 of 3 questions attempted
1. Which setting improves UI5 startup performance?
2. What is a request budget for a Fiori app?
3. A list report fires dozens of requests on load. What is a common cause?
Interview questions
1. How do you optimise Fiori app performance?
Answer it in your own words first, then compare.
2. How would you enforce performance budgets in a team?
Answer it in your own words first, then compare.
Check before use: lesson examples are educational, not a guarantee of correctness for your SAP edition or release. Sample code has not been executed on your SAP system. Confirm API availability, syntax, authorizations and business impact in an approved development or test environment.