estimate_count gem

project 3 connections

Small Ruby gem by Krzysztof Hasiński that wraps Postgres' EXPLAIN-based row-count estimation, exposing `estimate_count` as a drop-in alternative to `count`. Unlike some existing gems that solve the same problem, it does not require migrations.

status

active

license

open-source

project estimate_count gem

uses

PostgreSQL tool

Gem leverages Postgres EXPLAIN statistics for fast count estimation.

project estimate_count gem

uses

EXPLAIN / EXPLAIN ANALYZE concept

Implemented on top of EXPLAIN's row-count estimate.

person Krzysztof Hasiński

works_on

estimate_count gem project

Wrote the gem exposing EXPLAIN-based estimate_count; 'shameless plug' in the talk.

role: author

Provenance

Created in: Fantastic Databases and Where to Find Them — wroclove.rb ... 2026-04-17 22:11
Read by: 4 extractions