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Notice: some commands might require --max-old-space-size=2000 or above.

Using pre-built datasets

See documentation on Using pre-built datasets page.

Data structures

All data files are stored inside the ./pool/ dir by default.

See documentation on Data structures page.


The main script is invoked as gzemnid command [subcommand] (or ./gzemnid.js command [subcommand]), where [subcommand] is optional.

Here is the list of the current commands:

  • fetch — builds Should take about 2 minutes.
    • fetch run byField.json — builds locally without network connection, but you need to download byField.json manually from the registry to run that.
  • stats — runs subcommand rebuild.
    • stats rebuild — rebuilds stats.json, downloading stats for all packages present in Should take about 25 minutes.
    • stats update — updates stats.json for only newly added packages, keeping the numbers for already present packages.
  • meta — builds meta/ directory, downloading meta info for all packages present in Outdated files that were present in the meta/ directory are moved to meta.old/.
  • depsdb — runs subcommands plain, resolved, nested, stats,
    • depsdb plain — builds deps/deps.json. Requires meta/ dir contents.
    • depsdb resolved — builds deps/deps-resolved.json. Requires deps/deps.json.
    • depsdb nested — builds deps/deps-nested.json. Requires stats.json and deps/deps-resolved.json. Should take about 6 minutes.
    • depsdb stats — builds deps/deps-nested.txt. Requires stats.json and deps/deps-nested.json. Should take about 30 seconds.
  • packages — builds current/ directory, downloading latest versions for all packages present in Outdated files that were present in the current/ directory are moved to outdated/.
  • extract — runs subcommands partials, totals,
    • extract partials
    • extract totals
  • code search {regex} — performs a code search over a specified regular expression using the pre-built dataset.
  • ast execute {file.js} — performs an AST search using the pre-built dataset. Example script is located in examples/ast_status.js, run with gzemnid ast execute ./examples/ast_status.js.
  • server — starts the web server providing the search API endpoints.

Times are given for reference, could depend significantly on the internet connection speed and/or CPU speed, and increase over time with npm registry growth.


TODO: document server.

Started via gzemnid server.


Note: think twice before relying on the data obtained from Gzemnid or using it to decide on something.

Code search has both false negatives and false positives — some files are ignored, some files are unused, and some lines could be in a middle of a comment block. Also, your regexps are never ideal.

AST tree also ignores a list of excluded files and directories and minified code and includes unused code and files if those are present in the package for some reason.

Downloads/month are not equal to popularity, and you can't see which version is being used.

Code and AST search, among other things, takes only latest released package versions into an account. That could be significantly different from master, beta branches, also older versions could be much more popular that latest.

All datasets get out of date the moment you build them.

Scoped packages are ignored completely.

Gzemnid deceives you, keep that in mind. But it's still better than nothing.