feat: support seismic

[silver-ymz]

https://github.com/TusKANNy/seismic

benchmark on my local machine

• datasets: Splade on Ms Marco small
• machine: 8 vCPU, 32 GB, AMD Ryzen 7 7700, vmware Virtualization
• index build time: 182.95s
• index size: 692M

8 threads

• accuracy: 91.18%
• QPS: 10036.75

single thread

• accuracy: 91.23%
• QPS: 864.83

impl by the paper author

• index build time: 204s
• index size: 710M
• accuracy: 91.73%
• latency: 127 µs per query

bench params

• n_postings = 4000
• centroid_fraction = 0.1
• summary_energy = 0.4
• seismic_q_cut = 3
• seismic_heap_factor = 0.9

[silver-ymz]

PTAL @VoVAllen @usamoi

[silver-ymz]

In previous benchmark, seismic_heap_size is set to default value 100. Now in new benchmark, it's set to 10.

New results:

8 threads

• accuracy: 91.18%
• QPS: 10036.75

single thread

• accuracy: 91.23%
• QPS: 864.83