Why Svelte Skips the Virtual DOM
Svelte skips the Virtual DOM, treating it as runtime overhead. It acts as a compiler, generating precise JavaScript to update the DOM directly. This avoids the 'diffing' step of frameworks like React, leading to smaller bundles and faster updates.
Svelte treats the Virtual DOM not as an optimization, but as runtime overhead. Instead of shipping a library to compare object trees (diffing), Svelte is a compiler. It analyzes your code at build time and generates precise, surgical JavaScript that updates the DOM directly when state changes. This avoids the performance cost of diffing, resulting in smaller bundles and faster updates, especially on constrained devices. The main tradeoff is that a build step is non-negotiable.
Read the original → svelte.dev
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