[Project516]

What this changes

Adds a short "Compared with CheerpJ" section to the README: Java 25 support, start-up and javac times, download sizes, GUI support and licensing, next to CheerpJ 5.0.

Tests

The numbers are medians from one machine on 2026-11-08: headless Chromium, java-web 0.1.3 from npm, CheerpJ 5.0 from its CDN (cjrtnc.leaningtech.com/5.0/loader.js, cheerpjInit({ version: 25 })). Each test ran cold (a new browser context) then warm (the same context), twice; the tenth-of-a-CPU run ran the whole browser in a cgroup with CPUQuota=10%, once. Downloads were counted at the server for java-web and from the browser's finished requests for CheerpJ's CDN; the programs' own jars are left out.

Run	java-web 0.1.3	CheerpJ 5.0
Hello, cold	0.55 s, 3.65 MB	4.33 s, 10.78 MB
Hello, warm	0.17 s, 0 MB	2.37 s, 3.76 MB
timed template compile, cold	2.83 s, 7.37 MB	10.10 s, 15.77 MB
timed template compile, warm	2.44 s	5.47 s
commandv2 compile (two annotation processors), cold	3.55 s, 8.71 MB	10.37 s, 16.85 MB
Hello, cold, tenth of a CPU	16.6 s	58.9 s
timed compile, cold, tenth of a CPU	96 s	382 s

The CheerpJ facts come from its documentation: Java 25 is a preview in 5.0 (cheerpj.com/docs, changelog), it draws AWT and Swing windows (cheerpj.com/docs/explanation/architecture), and free use must load from its CDN, with a licence for business use (cheerpj.com/docs/licensing). javac runs on CheerpJ too: the compile tests above use javax.tools.

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[project516-review-bot]

This PR adds a 'Compared with CheerpJ' section to the README with a benchmark table comparing java-web 0.1.3 against CheerpJ 5.0 on Java 25. The numbers are medians from a single machine on 2026-11-08. The table covers start-up times, download sizes, javac performance, CPU-constrained runs, GUI support, and licensing.

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_{review-bot, model nvidia/nemotron-3-ultra-550b-a55b:free, verdict approve}