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brendan-kellambrendan-kellam
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fix: Improve symbol reference/definition list perf (#327)
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‎CHANGELOG.md‎

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@@ -9,6 +9,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
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### Fixed
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- Fixed issue with the symbol hover popover clipping at the top of the page. [#326](https://github.com/sourcebot-dev/sourcebot/pull/326)
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- Fixed slow rendering issue with large reference/definition lists. [#327](https://github.com/sourcebot-dev/sourcebot/pull/327)
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## [4.1.0] - 2025-06-02
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‎packages/web/src/app/[domain]/components/lightweightCodeHighlighter.tsx‎

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@@ -27,6 +27,9 @@ interface LightweightCodeHighlighter {
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renderWhitespace?: boolean;
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}
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// The maximum number of characters per line that we will display in the preview.
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const MAX_NUMBER_OF_CHARACTER_PER_LINE = 1000;
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/**
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* Lightweight code highlighter that uses the Lezer parser to highlight code.
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* This is helpful in scenarios where we need to highlight a ton of code snippets
@@ -49,12 +52,19 @@ export const LightweightCodeHighlighter = memo<LightweightCodeHighlighter>((prop
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return code.trimEnd().split('\n');
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}, [code]);
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const isFileTooLargeToDisplay = useMemo(() => {
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return unhighlightedLines.some(line => line.length > MAX_NUMBER_OF_CHARACTER_PER_LINE);
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}, [code]);
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const [highlightedLines, setHighlightedLines] = useState<React.ReactNode[] | null>(null);
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const highlightStyle = useCodeMirrorHighlighter();
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useEffect(() => {
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if (isFileTooLargeToDisplay) {
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return;
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}
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measure(() => Promise.all(
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unhighlightedLines
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.map(async (line, index) => {
@@ -103,12 +113,21 @@ export const LightweightCodeHighlighter = memo<LightweightCodeHighlighter>((prop
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const lineNumberDigits = String(lineCount).length;
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const lineNumberWidth = `${lineNumberDigits + 2}ch`; // +2 for padding
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if (isFileTooLargeToDisplay) {
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return (
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<div className="font-mono text-sm px-2">
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File too large to display in preview.
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</div>
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);
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}
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return (
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<div
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style={{
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fontFamily: tailwind.theme.fontFamily.editor,
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fontSize: tailwind.theme.fontSize.editor,
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whiteSpace: renderWhitespace ? 'pre-wrap' : 'none',
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wordBreak: 'break-all',
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}}
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>
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{(highlightedLines ?? unhighlightedLines).map((line, index) => (

‎packages/web/src/ee/features/codeNav/components/exploreMenu/referenceList.tsx‎

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@@ -3,18 +3,21 @@
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import { useBrowseNavigation } from "@/app/[domain]/browse/hooks/useBrowseNavigation";
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import { FileHeader } from "@/app/[domain]/components/fileHeader";
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import { LightweightCodeHighlighter } from "@/app/[domain]/components/lightweightCodeHighlighter";
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import { ScrollArea } from "@/components/ui/scroll-area";
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import { FindRelatedSymbolsResponse } from "@/features/codeNav/types";
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import { RepositoryInfo, SourceRange } from "@/features/search/types";
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import { base64Decode } from "@/lib/utils";
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import { useMemo } from "react";
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import { useMemo, useRef } from "react";
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import useCaptureEvent from "@/hooks/useCaptureEvent";
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import { useVirtualizer } from "@tanstack/react-virtual";
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interface ReferenceListProps {
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data: FindRelatedSymbolsResponse;
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revisionName: string;
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}
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const ESTIMATED_LINE_HEIGHT_PX = 30;
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const ESTIMATED_MATCH_CONTAINER_HEIGHT_PX = 30;
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export const ReferenceList = ({
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data,
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revisionName,
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const { navigateToPath } = useBrowseNavigation();
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const captureEvent = useCaptureEvent();
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return (
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<ScrollArea className="h-full">
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{data.files.map((file, index) => {
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const repoInfo = repoInfoMap[file.repositoryId];
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// Virtualization setup
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const parentRef = useRef<HTMLDivElement>(null);
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const virtualizer = useVirtualizer({
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count: data.files.length,
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getScrollElement: () => parentRef.current,
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estimateSize: (index) => {
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const file = data.files[index];
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const estimatedSize =
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file.matches.length * ESTIMATED_LINE_HEIGHT_PX +
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ESTIMATED_MATCH_CONTAINER_HEIGHT_PX;
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return estimatedSize;
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},
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overscan: 5,
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enabled: true,
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});
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return (
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<div key={index}>
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<div className="bg-accent py-1 px-2 flex flex-row sticky top-0">
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<FileHeader
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repo={{
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name: repoInfo.name,
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displayName: repoInfo.displayName,
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codeHostType: repoInfo.codeHostType,
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webUrl: repoInfo.webUrl,
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return (
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<div
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ref={parentRef}
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style={{
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width: "100%",
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height: "100%",
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overflowY: "auto",
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contain: "strict",
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}}
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>
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<div
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style={{
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height: virtualizer.getTotalSize(),
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width: "100%",
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position: "relative",
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}}
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>
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{virtualizer.getVirtualItems().map((virtualRow) => {
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const file = data.files[virtualRow.index];
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const repoInfo = repoInfoMap[file.repositoryId];
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return (
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<div
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key={virtualRow.key}
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data-index={virtualRow.index}
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ref={virtualizer.measureElement}
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style={{
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position: "absolute",
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transform: `translateY(${virtualRow.start}px)`,
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top: 0,
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left: 0,
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width: "100%",
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}}
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>
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<div
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className="bg-accent py-1 px-2 flex flex-row sticky top-0 z-10"
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style={{
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top: `-${virtualRow.start}px`,
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}}
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fileName={file.fileName}
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branchDisplayName={revisionName === "HEAD" ? undefined : revisionName}
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/>
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</div>
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<div className="divide-y">
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{file.matches
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.sort((a, b) => a.range.start.lineNumber - b.range.start.lineNumber)
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.map((match, index) => (
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<ReferenceListItem
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key={index}
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lineContent={match.lineContent}
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range={match.range}
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language={file.language}
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onClick={() => {
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captureEvent('wa_explore_menu_reference_clicked', {});
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navigateToPath({
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repoName: file.repository,
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revisionName,
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path: file.fileName,
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pathType: 'blob',
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highlightRange: match.range,
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})
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}}
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/>
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))}
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>
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<FileHeader
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repo={{
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name: repoInfo.name,
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displayName: repoInfo.displayName,
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codeHostType: repoInfo.codeHostType,
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webUrl: repoInfo.webUrl,
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}}
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fileName={file.fileName}
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branchDisplayName={revisionName === "HEAD" ? undefined : revisionName}
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/>
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</div>
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<div className="divide-y">
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{file.matches
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.sort((a, b) => a.range.start.lineNumber - b.range.start.lineNumber)
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.map((match, index) => (
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<ReferenceListItem
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key={index}
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lineContent={match.lineContent}
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range={match.range}
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language={file.language}
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onClick={() => {
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captureEvent('wa_explore_menu_reference_clicked', {});
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navigateToPath({
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repoName: file.repository,
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revisionName,
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path: file.fileName,
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pathType: 'blob',
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highlightRange: match.range,
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})
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}}
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/>
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))}
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</div>
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</div>
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</div>
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)
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})}
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</ScrollArea>
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)
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);
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})}
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</div>
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</div>
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);
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}
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