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Analyzed 4 days ago. based on code collected 4 days ago.

Project Summary

Semian is a library for controlling access to slow or unresponsive external services to avoid cascading failures.

When services are down they typically fail fast with errors like ECONNREFUSED and ECONNRESET which can be rescued in code. However, slow resources fail slowly. The thread serving the request blocks until it hits the timeout for the slow resource. During that time, the thread is doing nothing useful and thus the slow resource has caused a cascading failure by occupying workers and therefore losing capacity. Semian is a library for failing fast in these situations, allowing you to handle errors gracefully. Semian does this by intercepting resource access through heuristic patterns inspired by Hystrix and Release It.


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MIT License

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Project Security

Vulnerabilities per Version ( last 10 releases )

There are no reported vulnerabilities

Project Vulnerability Report

Security Confidence Index

Poor security track-record
Favorable security track-record

Vulnerability Exposure Index

Many reported vulnerabilities
Few reported vulnerabilities

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About Project Security


2 Other

30 Day Summary

Feb 29 2020 — Mar 30 2020

12 Month Summary

Mar 30 2019 — Mar 30 2020
  • 52 Commits
    Down -43 (45%) from previous 12 months
  • 14 Contributors
    Down 0 (0%) from previous 12 months