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TortoiseGit's icon overlays are usually what makes Explorer slow in large repos. Here's how the status cache and the overlay include/exclude lists work, and when to scope them instead of uninstalling.
TortoiseGit registers several overlay icon handlers with Windows Explorer so that repository status is visible directly in File Explorer. Because Windows enforces a system-wide cap on shell icon overlay slots, competing applications can consume the available handlers before TortoiseGit receives them. On Windows 11, the underlying shell mechanism differs from
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