Prefix Sliding Reduces Memory Overhead in Test-Time Scaling
August 25, 2026
Prefix Sliding optimizes test-time compute by discarding intermediate reasoning tokens while retaining essential instructions and the most recent context window. This method caps total memory requirements for long-reasoning tasks where early tokens lose relevance to the current state.
HOW THIS AFFECTS YOU
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builderYou can implement longer reasoning traces with significantly lower memory footprints.
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researcherThis provides a method to mitigate the quadratic cost of full attention during inference-time scaling.