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feat(workflow): resolve canvas re-rendering and logs perf issues #3844

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feat(workflow): resolve canvas re-rendering and logs perf issues #3844

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f225168
chore: fix conflicts
adithyaakrishna Mar 30, 2026
898428d
chore: fix rerenders
adithyaakrishna Mar 30, 2026
4afba1c
chore: fix review changes
adithyaakrishna Mar 30, 2026
2831432
chore: fix review changes
adithyaakrishna Mar 30, 2026
d37302a
chore: fix review changes
adithyaakrishna Mar 30, 2026
0ec73b0
chore: fix review changes
adithyaakrishna Mar 31, 2026
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1 change: 0 additions & 1 deletion apps/sim/app/(landing)/partners/page.tsx
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Original file line number Diff line number Diff line change
@@ -1,5 +1,4 @@
import type { Metadata } from 'next'
import Link from 'next/link'
import { getNavBlogPosts } from '@/lib/blog/registry'
import { martianMono } from '@/app/_styles/fonts/martian-mono/martian-mono'
import { season } from '@/app/_styles/fonts/season/season'
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15 changes: 14 additions & 1 deletion ...[workflowId]/components/terminal/components/output-panel/components/structured-output.tsx
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Original file line number Diff line number Diff line change
Expand Up @@ -711,11 +711,24 @@ export const StructuredOutput = memo(function StructuredOutput({
}, [])

// Reset expanded paths when data changes
const prevDataJsonRef = useRef<string>('')

useEffect(() => {
if (prevDataRef.current !== data || prevIsErrorRef.current !== isError) {
if (prevIsErrorRef.current !== isError) {
prevDataRef.current = data
prevIsErrorRef.current = isError
prevDataJsonRef.current = JSON.stringify(data)
setExpandedPaths(computeInitialPaths(data, isError))
return
}

if (prevDataRef.current !== data) {
const newJson = JSON.stringify(data)
if (prevDataJsonRef.current !== newJson) {
prevDataJsonRef.current = newJson
setExpandedPaths(computeInitialPaths(data, isError))
}
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@cursor cursor bot Mar 31, 2026

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Unguarded JSON.stringify can throw on non-serializable data

Medium Severity

The new deep-equality check calls JSON.stringify(data) without a try-catch. If data contains circular references, BigInt values, or other non-JSON-serializable structures, this will throw an unhandled error and crash the structured output component. The previous code only compared by reference (prevDataRef.current !== data), which can never throw.

Additional Locations (1)
Fix in Cursor Fix in Web

prevDataRef.current = data
}
}, [data, isError])

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