// multi-utility computation suite · offline · instant · precise
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│ computation suite │
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dev.perf-dns-propagation Calculator
Estimates DNS propagation time across major resolvers from TTL value and resolver cache aging in a application performance engineering context. DNS propagation doesn't happen simultaneously — resolvers cache records until TTL expires, so changes can take hours to reach all users even with low TTL.
Inputs
Ttl
Reference formula or conversion factor shown for context.
Nameservers
Reference formula or conversion factor shown for context.
Zones
Reference formula or conversion factor shown for context.
Results
min propagation
The value at the specified point or condition.
max propagation
The value at the specified point or condition.
cache efficiency
Useful output divided by total input, as a percentage. True 100% efficiency is impossible — losses appear as heat. LEDs: 30–50%. Electric motors: 85–97%. Switching supplies: 85–95%.
queries/TTL cycle
Queries executed per cache TTL cycle. Lower is better — high query count per cycle suggests the TTL is too short.