Everyone's setup is different, but there are some things you can do to optimize performance. Refer to the Performance Tuning guide for details.

RomVault initially decompresses and hashes all files in archives the first time an archive is scanned if you are using the default scanning method. This process takes time up front, but subsequent scans will be very fast. Archives are only rescanned if the archive modified time has changed.

CHD files are scanned similar to ZIP and 7z archives. The CHD contents are decompressed and hashed using different approaches depending on the CHD version. RomVault will natively verify most older CHD files prior to CHD V5. However, most people have V5 CHDs which are verified using chdman.exe. If chdman.exe is in the RomVault directory, it will be used.

• chdman.exe present: New CHDs are verified by decompressing and hashing the contents and the CHD file itself is hashed.
• chdman.exe absent: New CHDs are checked only by reading the SHA1 hash in the CHD header and the CHD file itself is hashed.

In short, you can speed up CHD scanning by removing chdman.exe, however its recommended to thoroughly verify all CHDs by leaving chdman.exe in place. RomVault will not need to rescan the CHDs unless they are modified, so its best to verify once - even if it takes awhile initially.

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