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Clear redundant monitor data
Clear unused monitors
Make covered values empty
Turn numeric strings to numbers
Round last digit where it reduces length by a lot
Round positions of blocks and comments
Use item [last] of [list]

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Compress identifiers of
Blocks
Custom block arguments
Variables
Lists
Broadcasts
Comments

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Test mode (disables saving)

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Result: nothing yet (Please wait. The download of compressed file should start soon)