WebAssembly vs. Docker: Technical Trade-offs for Indie Founders

This review analyzes Alex Bogomolov's technical comparison of WebAssembly and Docker, evaluating their respective merits for indie founders making infrastructure choices based on size, performance, and security.

TL;DR

Best for: Indie founders prioritizing minimal deployment size, fast startup times, and a strong security sandbox for compute-bound tasks or serverless functions. Skip if: Your application requires direct OS-level access, complex networking configurations, or relies heavily on existing Linux-based tooling and libraries. Bottom line: WebAssembly offers significant advantages in resource efficiency and security for specific use cases, challenging Docker's default status for new projects.

Methodology

This v0 review draws on Alex Bogomolov's published claims in his blog post, "Docker images are MB; a full game engine compiles to 35MB WASM," accessed on 2026-05-12. The subject of this analysis is the technical comparison between WebAssembly (WASM) and Docker containerization technologies, as presented by Bogomolov. We cover the founder's claims regarding WASM's superior deployment size, startup performance, security model, and cross-platform portability when contrasted with Docker. This includes the specific example of a 35MB WASM-compiled game engine. What is not covered in this review are independent performance benchmarks, long-term operational workflows for specific applications, or exhaustive comparisons of all possible edge cases in production environments. This review will be re-tested when observed behavior or new industry data diverges from the founder's claims.

What It Does

Alex Bogomolov's analysis positions WebAssembly as a compelling alternative to Docker for specific server-side workloads, primarily by highlighting its fundamental architectural differences that lead to significant resource efficiencies. The core arguments revolve around footprint, speed, security, and environment independence.

Minimizing deployment size

Bogomolov emphasizes WASM's ability to produce extremely compact binaries. He cites an example where a full game engine compiles to just 35MB when targeting WASM. This contrasts sharply with typical Docker images, which often carry a base operating system layer, leading to sizes in the hundreds of megabytes, even for simple applications. The smaller size of WASM modules means less storage, faster downloads, and reduced memory footprint during execution.

Accelerating startup performance

Due to their minimal size and lack of an embedded operating system, WASM modules exhibit near-instantaneous startup times. Bogomolov's implicit comparison is with Docker containers, which require the container runtime to initialize, potentially involving OS-level processes, leading to cold start latencies. For serverless functions or event-driven architectures where rapid scaling and responsiveness are critical, WASM's startup speed is a distinct advantage.

Strengthening the security model

WASM operates within a strict sandbox environment, similar to a browser's JavaScript engine. It cannot directly access the host operating system's file system or network without explicit permissions passed through a WebAssembly System Interface (WASI). This inherent isolation provides a robust security boundary, making it safer to run untrusted code. Docker, while providing process isolation, shares the host kernel, which introduces a larger attack surface compared to WASM's capabilities-based security model.

Enhancing cross-platform portability

WebAssembly's design goal is

Pull quote: “He cites an example where a full game engine compiles to just 35MB when targeting WASM.”