https://www.drupal.org/node/1081266
Avoid re-scanning module directory when a filename or a module is missing [#1081266] | Drupal.org
Jul 23, 2016 - Proposed commit message (D7) Issue #1081266 by stefan.r, jeroen.b, mikeytown2, tsphethean, mfb, joseph.olstad, marcelovani, Fabianx: Avoid re-scanning module...