Deleting 3,876 Lines of Rust Code Outshone Adding New Features
Reducing nearly 4,000 lines of Rust code through legacy protocol removal proved more impactful than adding new features. This week's efforts streamlined the p2p stack and resolved unreliable Python tests, completing the task across 3 pull requests and 5 commits. The central success involved eliminating Floodsub from minip2p, establishing Gossipsub as the universal standard in 53 files.
Removing Floodsub from minip2p
Most of the development occurred in minip2p, a Rust-based p2p networking implementation. Floodsub, an aging pubsub protocol, was simple but inefficient, sending all data to every peer. Since Gossipsub had already become the standard, keeping both in a "mini" version introduced avoidable complexity.
Three commits completely removed Floodsub. This caused compatibility issues with documentation and the public API, necessitating updates to 53 files. The cleanup began by removing references from the documentation site and README, then proceeded to alter the core pubsub logic to exclusively use Gossipsub. Finally, bindings were adjusted so users no longer needed to choose a router.
The results were clear: only 141 new lines compared to 3,876 deletions. Despite commit messages flagging this as a breaking change with !, the codebase is now considerably more concise.
Fixing subprocess issues in py-libp2p
Stability improvements in py-libp2p focused on test_echo_thin_waist, which experienced problems with subprocess management. Improperly reaped child processes created zombie processes, leading to sporadic CI failures unrelated to the actual code.
Two commits ensured echo subprocesses were terminated correctly. Although these changes added just 18 lines, they significantly enhanced local development stability and the CI pipeline reliability.
Pull request progress and storage enhancements
Three key pull requests advanced this week:
- minip2p: PR #199 was merged, fully removing Floodsub from all public components. Encompassing documentation and auto-generated code, this effort eliminated 4,258 lines, simplifying the framework for new contributors by eliminating the need to choose between pubsub versions in favor of the more scalable option.
- py-libp2p: PR #1542 was deployed, addressing issue #1541 about echo subprocess reaping in
test_echo_thin_waist. - sixb: PR #612 continues open for "storage: durable, swept file upload sessions for pg and sqlite," aiming to create more reliable storage sessions for SQLite and PostgreSQL databases.
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I want to try this tonight. I once axed 1,200 lines of C++ and the build time finally dropped under 30s. Just like stripping out an outdated protocol entirely—removing Floodsub from minip2p cut 3,876 lines across 53 files, leaving only Gossipsub as the standard—that kind of ruthless deletion is what actually makes the codebase leaner, not just faster to compile.
So refreshing. I'm wondering if you used any specific refactoring tools or just manually hunted down those dead protocols? Efforts this week focused on simplifying a p2p stack and fixing flaky Python tests, resulting in a net reduction of nearly 4,000 lines across 3 PRs and 5 commits. The main achievement was the removal of Floodsub from minip2p, establishing Gossipsub as the sole standard across 53 different files.
Finally breathing again. I just nuked a massive chunk of boilerplate in Pytest that was causing 502 errors, specifically ensuring echo subprocesses are reaped cleanly to stop those random CI failures.