Direct answer

The shared-random setting is not a general-purpose performance slider. Purpur explains that turning it off permits some RNG manipulation used by technical players, with potential safety risks.

How to check it

  1. Locate shared-random under your generated Purpur world entity settings.
  2. Identify whether players rely on RNG-dependent redstone or technical farms.
  3. Measure server behavior and record the existing value before changing it.

What to change

  1. Prefer leaving the generated value unchanged for normal servers.
  2. If technical gameplay specifically requires changed RNG behavior, test on a disposable world copy first.
  3. After any change, test affected farms and repeat the original workload; restore the old value if outcomes differ unexpectedly.

Software and version notes

Compatibility and safety

Purpur labels changes to this mechanism as insufficiently tested/unsafe. Do not claim it will deliver a quantified TPS gain, and do not assume the old docs match every build.

Verify the result

Verify technical contraptions, RNG-dependent behavior and server stability before and after; rollback immediately if behavior is unexpected.

References