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FieldDisplay: add cache to reuse field value calculations (#35072)

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* add timeline value cache

* add timeline value cache

* with console logs

* cleanup

Co-authored-by: Leon Sorokin <leeoniya@gmail.com>
This commit is contained in:
Ryan McKinley 2021-06-02 11:01:23 -07:00 committed by GitHub
parent 4093fae99a
commit 744ca8d439
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 25 additions and 0 deletions
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25
packages/grafana-data/src/field/fieldOverrides.ts
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@ -2,6 +2,8 @@ import {
ApplyFieldOverrideOptions,
DataFrame,
DataLink,
DisplayProcessor,
DisplayValue,
DynamicConfigValue,
Field,
FieldColorModeId,
@ -187,6 +189,11 @@ export function applyFieldOverrides(options: ApplyFieldOverrideOptions): DataFra
timeZone: options.timeZone,
});
// Wrap the display with a cache to avoid double calls
if (newField.config.unit !== 'dateTimeFromNow') {
newField.display = cachingDisplayProcessor(newField.display, 2500);
}
// Attach data links supplier
newField.getLinks = getLinksSupplier(
newFrame,
@ -204,6 +211,24 @@ export function applyFieldOverrides(options: ApplyFieldOverrideOptions): DataFra
});
}
function cachingDisplayProcessor(disp: DisplayProcessor, maxCacheSize = 2500): DisplayProcessor {
const cache = new Map<any, DisplayValue>();
return (value: any) => {
let v = cache.get(value);
if (!v) {
// Don't grow too big
if (cache.size === maxCacheSize) {
cache.clear();
}
v = disp(value);
cache.set(value, v);
}
return v;
};
}
export interface FieldOverrideEnv extends FieldOverrideContext {
fieldConfigRegistry: FieldConfigOptionsRegistry;
}