Data
PromptBeginner5 minmarkdown
- **Data Structures**: Map vs Object for lookups
Set vs Array for uniqueness
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Set vs Array for uniqueness
implement caching
unnecessary joins
data volume
missing indexes
eliminating N+1 problems
database queries
dicts)
pagination
missing indexes
profiling data
data volumes
data structure choices
cold start
HyperLogLog
minutes for session data
random values) in keys that should be shared
data growth
>70% for warm data)
hot key
scalable for distributed systems
materialized views
Memcached for simple key-value hot data
cardinality