SGLang Optimizes GLM-5.2: 8xB300 Hits 500+ tok/s for Single User
BanghuaZ · x · 2026-07-15
The SGLang team shared details on their inference optimization for the GLM-5.2 NVFP4 model, achieving a generation speed of 500+ tok/s for a single user (bs=1) on 8xB300 hardware.
- Performance: Within two weeks of release, single-user interactive speed increased by 18% to 34%, and peak throughput under high concurrency rose by 6% to 11%. Thanks to the new TopK-V2 kernel, interactive latency remains nearly flat for ultra-long contexts ranging from 80K to 1M tokens.
- Optimization Strategies: Focused on two main areas. First, reducing system overhead via zero-bubble scheduling, removing synchronization operations, and kernel fusion. Second, rewriting core operators, including TopK-V2 and CuTe DSL-based GEMM.
- Architectural Advantages: GLM-5.2 applies IndexShare technology in its DSA layers and is equipped with a stronger MTP head that reuses IndexShare and KVShare, further boosting inference performance.
Related event: SGLang v0.5.15 tunes GLM-5.2 serving to 500+ tok/s on 8×B300(6 posts)→
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