Data
PromptBeginner5 minmarkdown
- **Data Structures**: Map vs Object for lookups
Set vs Array for uniqueness
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16,027 skills indexed with the new KISS metadata standard.
Set vs Array for uniqueness
implement caching
unnecessary joins
data volume
missing indexes
eliminating N+1 problems
database queries
dicts)
race conditions
pagination
serialized async work
excessive reads/writes
missing indexes
data volumes
profiling data
contention points
data structure choices
cold start
read/write ratios
HyperLogLog
minutes for session data
random values) in keys that should be shared
>70% for warm data)
data growth