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bartblast/hologram

Hologram is a full-stack framework that compiles Elixir applications to run entirely in the browser, enabling client-side execution of Elixir and Erlang code. It provides a comprehensive JavaScript runtime that mirrors the BEAM's standard library, error handling, and template rendering, while managing state, routing, and real-time communication via Server-Sent Events. The system also includes extensive tooling for compilation, benchmarking, and testing to ensure consistency between the server and client environments.

55.0

Adequate · 6 August 2026

58k

lines of production code

Elixir

with JavaScript

1

bus factor · 52 authors in all

3

measurements over time

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How it got here

2020–2024 · Hologram client-side runtime and compiler

This period focused on building the Hologram framework's client-side runtime, porting core Elixir and Erlang standard library functions to JavaScript to enable server-side logic to run in the browser. The work included implementing a new compiler, template engine, and router, while establishing comprehensive test coverage for both Elixir and JavaScript components to ensure behavioral parity.

84 changes

2025–2026 · Runtime, Realtime, and Benchmarking Infrastructure

This period focused on establishing the client-side JavaScript runtime, including ERTS modules, regex engines, and JS interop, alongside server-side realtime (SSE) and middleware systems. The work was heavily supported by comprehensive test coverage for these new features and the introduction of a rigorous benchmarking suite to measure compiler and runtime performance.

89 changes

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About this page

  • The description of this project is derived from its own commit history, not from its README.
  • The score is its highest published measurement, taken on 6 August 2026 at a pinned commit. It is not a live figure and does not change until the project is measured again.
  • Measured at commit 009d92a9de — the exact code this score is about.
  • Scored under rubric rubric-2026.08.19. Score the same commit under that rubric and you get the same number.
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