The article discusses the use of SIMD instructions to improve substring searching algorithms by comparing short character sequences quickly.
The Karp-Rabin algorithm is modified to use SIMD to perform parallel vector comparisons, speeding up computations.
It explains two specific algorithms using SIMD: one generic for all SIMD sets and another specific to SSE4.1 and AVX2 using the MPSADBW instruction.
Performance results show SIMD algorithms outperform traditional C 'strstr' across various processors.
ARM Neon and AArch64 implementations also show impressive improvements in substring searching efficiency.
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