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Astro Islands JavaScript Budget

Sum your measured gzip estimates by hydration directive. Shared runtime bytes must be entered once. Deferred islands still cost bytes when activated; this is a planning model, not a bundler measurement.

astro-islands-costLOCAL WORKSPACE

Enabling local controls…

Inputs and settings

Processed in this tab without uploading or storing inputs. Each text field is limited to 32 KiB and complete output to 1 MiB; additional format and model limits apply.

Results

Review the settings and run. Editing inputs clears old results.

Processing model and limits

Sum your measured gzip estimates by hydration directive. Shared runtime bytes must be entered once. Deferred islands still cost bytes when activated; this is a planning model, not a bundler measurement.

Data and model checked: Official reference ↗

How to use this tool

Load the example, confirm field units and processing rules, then run locally. Editing any input clears the old result. Copy or download the complete output explicitly.

When not to use it

Sum your measured gzip estimates by hydration directive. Shared runtime bytes must be entered once. Deferred islands still cost bytes when activated; this is a planning model, not a bundler measurement.