10 posts loaded.
Feb 13, 202616 min read
Minor optimizations found in React source code
Small React source-level optimizations explained: Object.freeze in DEV, Hidden Class effects, branch ordering, and Smi/Double choices.
react
Feb 10, 20268 min read
ESM is asynchronous, so how is static analysis possible?
ESM can be asynchronous and still statically analyzable. This post explains why through the Construction, Instantiation, and Evaluation phases.
javascriptesm+1
Feb 01, 20265 min read
Why Map and Set are known to have better performance than Array
Why Map and Set often outperform Array: hash-based lookup complexity, insertion behavior, and traversal trade-offs including cache locality.
javascriptdata-structure+1
Jan 23, 20264 min read
Measure and improve the performance of the AI tool you created
Rather than judging the quality of AI tools solely by feel, we have a record of quantifying the extent of improvement through datasets and automatic scoring.
aiprompt-smith
Dec 20, 20255 min read
Why bundlers exist
In this article, we summarize why bundlers emerged, what a dependency graph is, and why Vite took a different approach.
bundlervite
Dec 01, 20257 min read
Attaching a RAG-based AI chatbot to an open source document site
A practical guide to adding a RAG chatbot to open source docs, covering model choice, retrieval pipeline design, and cost-aware operations.
aifirsttx
Nov 01, 20254 min read
How does RSC split server/client bundles?
Tracing Next.js internals to explain how React Server Components split server and client bundles from build-time transforms to runtime restoration.
nextjsreact
Oct 27, 20255 min read
Measure, Compare, Decide - Filter Implementation Thought Process
The process of thinking of anxiety as a question, question as measurement, and measurement as confidence while implementing the filter.
reactlearn
Oct 12, 202512 min read
Server synchronization of the Local-First library: Connecting IndexedDB and React with useSyncExternalStore and memory cache
How we bridge IndexedDB's async model with React's sync state using useSyncExternalStore and a memory cache pattern to reduce sync boilerplate by 90%.
reactopensource+1
Oct 12, 202514 min read
CSR Revisited Solving Blank Screens: Prepaint's Snapshot Restoration and Stabilization Journey
How Prepaint solved CSR revisit blank screens with snapshot restore, then stabilized duplicate-rendering issues by introducing overlay mode.
reactopensource+1