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Increase recalculation performance by additional caching

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This commit is contained in:
Tobias Hößl 2020-06-07 11:44:07 +02:00
parent 18bc495bd8
commit bc3b8be78d
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GPG Key ID: 1D780C7599C2D2A2
1 changed files with 30 additions and 18 deletions
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48
client/src/app/core/ui-services/linenumbering.service.ts
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@ -377,22 +377,27 @@ export class LinenumberingService {
* @returns {LineNumberRange}
*/
public getLineNumberRange(html: string): LineNumberRange {
const fragment = this.htmlToFragment(html);
const range = {
from: null,
to: null
};
const lineNumbers = fragment.querySelectorAll('.os-line-number');
for (let i = 0; i < lineNumbers.length; i++) {
const node = lineNumbers.item(i);
const number = parseInt(node.getAttribute('data-line-number'), 10);
if (range.from === null || number < range.from) {
range.from = number;
}
if (range.to === null || number + 1 > range.to) {
range.to = number + 1;
const cacheKey = this.djb2hash(html);
let range = this.lineNumberCache.get(cacheKey);
if (!range) {
const fragment = this.htmlToFragment(html);
range = {
from: null,
to: null
};
const lineNumbers = fragment.querySelectorAll('.os-line-number');
for (let i = 0; i < lineNumbers.length; i++) {
const node = lineNumbers.item(i);
const number = parseInt(node.getAttribute('data-line-number'), 10);
if (range.from === null || number < range.from) {
range.from = number;
}
if (range.to === null || number + 1 > range.to) {
range.to = number + 1;
}
}
}
this.lineNumberCache.put(cacheKey, range);
return range;
}
@ -482,10 +487,17 @@ export class LinenumberingService {
* @return {string[]}
*/
public splitToParagraphs(html: string): string[] {
const fragment = this.htmlToFragment(html);
return this.splitNodeToParagraphs(fragment).map((node: Element): string => {
return node.outerHTML;
});
const cacheKey = this.djb2hash(html);
let cachedParagraphs = this.lineNumberCache.get(cacheKey);
if (!cachedParagraphs) {
const fragment = this.htmlToFragment(html);
cachedParagraphs = this.splitNodeToParagraphs(fragment).map((node: Element): string => {
return node.outerHTML;
});
this.lineNumberCache.put(cacheKey, cachedParagraphs);
}
return cachedParagraphs;
}
/**