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Optimize Transformer Inference Latency
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Optimize Transformer Inference Latency

HardPython

Problem

How would you optimize the latency of an inference endpoint serving a large transformer model?

Implement optimize_latency(optimizations, memory_budget) to select compatible optimizations that maximize total latency reduction under a memory budget. Each optimization may require one prerequisite, and selecting an optimization requires selecting its entire prerequisite chain. Return the maximum achievable latency reduction.

Each optimization is a dictionary with integer fields memory, reduction, and requires, where requires is another index or -1. The prerequisite graph is a forest. Return an integer.

Constraints

  • 1 <= len(optimizations) <= 200
  • 0 <= memory_budget <= 10000
  • 1 <= optimization.memory <= memory_budget or the optimization is unselectable
  • 0 <= optimization.reduction <= 10^6
  • requires is -1 or a valid index different from the optimization index
  • The prerequisite graph is a forest with no cycles

Function Signature

def optimize_latency(optimizations, memory_budget):
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