src/vs/editor/contrib/suggest/completionModel.ts/CompletionModel/_createCachedState
class CompletionModel:	private _createCachedState(): void {

		this._providerInfo = new Map();

		const labelLengths: number[] = [];

		const { leadingLineContent, characterCountDelta } = this._lineContext;
		let word = '';
		let wordLow = '';

		// incrementally filter less
		const source = this._refilterKind === Refilter.All ? this._items : this._filteredItems!;
		const target: StrictCompletionItem[] = [];

		// picks a score function based on the number of
		// items that we have to score/filter and based on the
		// user-configuration
		const scoreFn: FuzzyScorer = (!this._options.filterGraceful || source.length > 2000) ? fuzzyScore : fuzzyScoreGracefulAggressive;

		for (let i = 0; i < source.length; i++) {

			const item = source[i];

			if (item.isInvalid) {
				continue; // SKIP invalid items
			}

			// collect all support, know if their result is incomplete
			this._providerInfo.set(item.provider, Boolean(item.container.incomplete));

			// 'word' is that remainder of the current line that we
			// filter and score against. In theory each suggestion uses a
			// different word, but in practice not - that's why we cache
			const overwriteBefore = item.position.column - item.editStart.column;
			const wordLen = overwriteBefore + characterCountDelta - (item.position.column - this._column);
			if (word.length !== wordLen) {
				word = wordLen === 0 ? '' : leadingLineContent.slice(-wordLen);
				wordLow = word.toLowerCase();
			}

			// remember the word against which this item was
			// scored
			item.word = word;

			if (wordLen === 0) {
				// when there is nothing to score against, don't
				// event try to do. Use a const rank and rely on
				// the fallback-sort using the initial sort order.
				// use a score of `-100` because that is out of the
				// bound of values `fuzzyScore` will return
				item.score = FuzzyScore.Default;

			} else {
				// skip word characters that are whitespace until
				// we have hit the replace range (overwriteBefore)
				let wordPos = 0;
				while (wordPos < overwriteBefore) {
					const ch = word.charCodeAt(wordPos);
					if (ch === CharCode.Space || ch === CharCode.Tab) {
						wordPos += 1;
					} else {
						break;
					}
				}

				if (wordPos >= wordLen) {
					// the wordPos at which scoring starts is the whole word
					// and therefore the same rules as not having a word apply
					item.score = FuzzyScore.Default;

				} else if (typeof item.completion.filterText === 'string') {
					// when there is a `filterText` it must match the `word`.
					// if it matches we check with the label to compute highlights
					// and if that doesn't yield a result we have no highlights,
					// despite having the match
					let match = scoreFn(word, wordLow, wordPos, item.completion.filterText, item.filterTextLow!, 0, false);
					if (!match) {
						continue; // NO match
					}
					if (compareIgnoreCase(item.completion.filterText, item.textLabel) === 0) {
						// filterText and label are actually the same -> use good highlights
						item.score = match;
					} else {
						// re-run the scorer on the label in the hope of a result BUT use the rank
						// of the filterText-match
						item.score = anyScore(word, wordLow, wordPos, item.textLabel, item.labelLow, 0);
						item.score[0] = match[0]; // use score from filterText
					}

				} else {
					// by default match `word` against the `label`
					let match = scoreFn(word, wordLow, wordPos, item.textLabel, item.labelLow, 0, false);
					if (!match) {
						continue; // NO match
					}
					item.score = match;
				}
			}

			item.idx = i;
			item.distance = this._wordDistance.distance(item.position, item.completion);
			target.push(item as StrictCompletionItem);

			// update stats
			labelLengths.push(item.textLabel.length);
		}

		this._filteredItems = target.sort(this._snippetCompareFn);
		this._refilterKind = Refilter.Nothing;
		this._stats = {
			pLabelLen: labelLengths.length ?
				quickSelect(labelLengths.length - .85, labelLengths, (a, b) => a - b)
				: 0
		};
	}