File sizes don't match the ones reported by Vite on build

[silvenon]

Describe the bug

Upon building Vite reports gzipped and uncompressed file sizes.

DevTools appears to show gzipped first, then in parenthesis the uncompressed size, but those numbers don't match what Vite reports.

This is reported by Vite:

This is a chunk size found in DevTools:

It doesn't match neither compressed nor uncompressed size.

Reproduction

https://github.com/silvenon/repro/tree/vite-devtools-sizes

gh repo clone silvenon/repro -b vite-devtools-sizes
cd repro

System Info

System:
    OS: macOS 26.4
    CPU: (8) arm64 Apple M1 Pro
    Memory: 99.13 MB / 16.00 GB
    Shell: 5.9 - /bin/zsh
  Binaries:
    Node: 22.22.0 - /Users/silvenon/.n/bin/node
    npm: 10.9.4 - /Users/silvenon/.n/bin/npm
    pnpm: 10.23.0 - /Users/silvenon/.n/bin/pnpm
    bun: 1.1.29 - /Users/silvenon/.bun/bin/bun
    Deno: 1.45.2 - /opt/homebrew/bin/deno
  Browsers:
    Chrome: 146.0.7680.165
    Firefox: 147.0.1
    Safari: 26.4

Used Package Manager

pnpm

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