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IntervalTrigger hardcoded value

See original GitHub issue

OpenUI5 version: Latest Browser/version (+device/version): Chrome latest

Hi,

I see that ui5 uses a central IntervalTrigger to dispatch events. It is created with a default/hardcoded value of 200ms.

https://github.com/SAP/openui5/blob/2c015796043a3fc7e0e322573d4dd6cfd932ff92/src/sap.ui.core/src/sap/ui/core/IntervalTrigger.js#L152

We would like to improve the performance for our users and thus tune this parameter (lowering the value). How can we achieve this? Is this 200 configurable?

Issue Analytics

State:
Created 4 years ago
Reactions:1
Comments:6 (2 by maintainers)

Top GitHub Comments

2reactions

codeworriorcommented, Jun 24, 2019

The IntervalTrigger is mainly used by the ResizeHandler, a service that regularly checks a set of registered DOM elements for size changes. It was introduced long ago because at that time there was no cross-browser resize-event available for arbitrary DOM elements, only for the window. In the recent months, ResizeObserver became available in many modern browsers and is therefore currently being evaluated as an alternative.

So the answer is NO, not all function invocations have to pass that gateway. Only a very small subset of functions is triggered by that interval. The purpose of the ResizeHandler is no secret, but documentation is, ehm, reduced to a minimum.

0reactions

Naramsimcommented, Jun 24, 2019

Hi, I don’t have any samples right now. Is it true that (I didn’t read all the codebase) that InternalTrigger is some sort of gateway where all the function’s invocations have to pass? Or only some of them? I just would like some documentation about why this is in place and what’s its purpose.

About mobile batteries: I don’t really understand why a thread (loop) should always run every 200ms at all. In most of the cases, it will just do nothing after the page loaded.

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