• Version: Node.js master (10.0.0 after 2018-01-15, see npm: last nightly / v8-canary make npm update unusable #19405 (comment)), npm 5.6.0
• Platform: Windows 7 x64 (maybe all)
• Subsystem: npm

Please, check if this is reproducible:

1. Install/download last nightly or v8-canary build.

2. Run npm update or npm update -g for a package with many dependencies (see an example in npm: last nightly / v8-canary make npm update unusable #19405 (comment)).

I have 1.5 GB memory consumption, ~100% CPU, and never-ending process without any output messages.

Installing / using Node.js v9.8.0 with the same npm fixes the issue.