Double Sum combine1: Maximum use of data abstraction: Best: 9.07 (2%), Overall Best: 9.09 40-most: 9.11 cycles/element Double Sum combine2: Take vec_length() out of loop: Best: 9.02 (94%), Overall Best: 9.02 40-most: 9.02 cycles/element Double Sum combine3: Array reference to vector data: Best: 3.01 (92%), Overall Best: 3.01 40-most: 3.01 cycles/element Double Sum combine3w: Update *dest within loop only with write: Best: 3.01 (100%), Overall Best: 3.01 40-most: 3.01 cycles/element Double Sum combine4: Array reference, accumulate in temporary: Best: 3.00 (10%), Overall Best: 3.01 40-most: 3.01 cycles/element Double Sum combine4b: Include bonds check in loop: Best: 3.00 (18%), Overall Best: 3.01 40-most: 3.01 cycles/element Double Sum combine4p: Pointer reference, accumulate in temporary: Best: 3.00 (8%), Overall Best: 3.01 40-most: 3.01 cycles/element Double Sum combine5: Array code, unrolled by 2: Best: 3.00 (4%), Overall Best: 3.01 40-most: 3.01 cycles/element Double Sum combine5p: Pointer code, unrolled by 2, for loop: Best: 3.00 (6%), Overall Best: 3.01 40-most: 3.01 cycles/element Double Sum unroll2aw: Array code, unrolled by 2, while loop: Best: 3.00 (6%), Overall Best: 3.01 40-most: 3.01 cycles/element Double Sum unroll3a: Array code, unrolled by 3: Best: 3.00 (4%), Overall Best: 3.01 40-most: 3.01 cycles/element Double Sum unroll4a: Array code, unrolled by 4: Best: 3.00 (8%), Overall Best: 3.01 40-most: 3.01 cycles/element Double Sum unroll5a: Array code, unrolled by 5: Best: 3.00 (6%), Overall Best: 3.01 40-most: 3.01 cycles/element Double Sum unroll6a: Array code, unrolled by 6: Best: 3.00 (6%), Overall Best: 3.01 40-most: 3.01 cycles/element Double Sum unroll7a: Array code, unrolled by 7: Best: 3.00 (10%), Overall Best: 3.00 40-most: 3.01 cycles/element Double Sum unroll8a: Array code, unrolled by 8: Best: 3.00 (4%), Overall Best: 3.00 40-most: 3.01 cycles/element Double Sum unroll9a: Array code, unrolled by 9: Best: 3.00 (10%), Overall Best: 3.01 40-most: 3.01 cycles/element Double Sum unroll10a: Array code, unrolled by 10: Best: 3.00 (4%), Overall Best: 3.01 40-most: 3.01 cycles/element Double Sum unroll16a: Array code, unrolled by 16: Best: 3.00 (12%), Overall Best: 3.01 40-most: 3.01 cycles/element Double Sum unroll2: Pointer code, unrolled by 2: Best: 3.00 (12%), Overall Best: 3.01 40-most: 3.01 cycles/element Double Sum unroll3: Pointer code, unrolled by 3: Best: 3.00 (16%), Overall Best: 3.01 40-most: 3.01 cycles/element Double Sum unroll4: Pointer code, unrolled by 4: Best: 3.00 (2%), Overall Best: 3.01 40-most: 3.01 cycles/element Double Sum unroll8: Pointer code, unrolled by 8: Best: 3.00 (12%), Overall Best: 3.01 40-most: 3.01 cycles/element Double Sum unroll16: Pointer code, unrolled by 16: Best: 3.00 (6%), Overall Best: 3.01 40-most: 3.01 cycles/element Double Sum combine6: Array code, unrolled by 2, Superscalar x2: Best: 1.50 (34%), Overall Best: 1.50 40-most: 1.51 cycles/element Double Sum unroll4x2a: Array code, unrolled by 4, Superscalar x2: Best: 1.50 (38%), Overall Best: 1.50 40-most: 1.51 cycles/element Double Sum unroll8x2a: Array code, unrolled by 8, Superscalar x2: Best: 1.50 (34%), Overall Best: 1.51 40-most: 1.51 cycles/element Double Sum unroll3x3a: Array code, unrolled by 3, Superscalar x3: Best: 1.00 (56%), Overall Best: 1.00 40-most: 1.01 cycles/element Double Sum unroll4x4a: Array code, unrolled by 4, Superscalar x4: Best: 1.00 (30%), Overall Best: 1.00 40-most: 1.01 cycles/element Double Sum unroll5x5a: Array code, unrolled by 5, Superscalar x5: Best: 1.00 (38%), Overall Best: 1.00 40-most: 1.01 cycles/element Double Sum unroll6x6a: Array code, unrolled by 6, Superscalar x6: Best: 1.00 (26%), Overall Best: 1.01 40-most: 1.01 cycles/element Double Sum unroll7x7a: Array code, unrolled by 7, Superscalar x7: Best: 1.00 (50%), Overall Best: 1.01 40-most: 1.01 cycles/element Double Sum unroll8x4a: Array code, unrolled by 8, Superscalar x4: Best: 1.00 (52%), Overall Best: 1.00 40-most: 1.01 cycles/element Double Sum unroll8x8a: Array code, unrolled by 8, Superscalar x8: Best: 1.00 (50%), Overall Best: 1.00 40-most: 1.01 cycles/element Double Sum unroll9x9a: Array code, unrolled by 9, Superscalar x9: Best: 1.00 (94%), Overall Best: 1.00 40-most: 1.00 cycles/element Double Sum unroll10x10a: Array code, unrolled by 10, Superscalar x10: Best: 1.00 (98%), Overall Best: 1.00 40-most: 1.00 cycles/element Double Sum unroll2x6a: Array code, unrolled by 12, Superscalar x6: Best: 1.00 (58%), Overall Best: 1.00 40-most: 1.01 cycles/element Double Sum unroll12x12a: Array code, unrolled by 12, Superscalar x12: Best: 1.00 (86%), Overall Best: 1.00 40-most: 1.00 cycles/element Double Sum unroll8x2: Pointer code, unrolled by 8, Superscalar x2: Best: 1.50 (36%), Overall Best: 1.50 40-most: 1.51 cycles/element Double Sum unroll8x4: Pointer code, unrolled by 8, Superscalar x4: Best: 1.00 (36%), Overall Best: 1.00 40-most: 1.01 cycles/element Double Sum unroll8x8: Pointer code, unrolled by 8, Superscalar x8: Best: 0.75 (70%), Overall Best: 0.75 40-most: 0.76 cycles/element Double Sum unroll9x3: Pointer code, unrolled by 9, Superscalar x3: Best: 1.00 (12%), Overall Best: 1.01 40-most: 1.01 cycles/element Double Sum unrollx2as: Array code, Unroll x2, Superscalar x2, noninterleaved: Best: 1.50 (32%), Overall Best: 1.51 40-most: 1.51 cycles/element Double Sum combine7: Array code, unrolled by 2, different associativity: Best: 1.50 (42%), Overall Best: 1.51 40-most: 1.51 cycles/element Double Sum unroll3aa: Array code, unrolled by 3, Different Associativity: Best: 1.00 (52%), Overall Best: 1.01 40-most: 1.01 cycles/element Double Sum unroll4aa: Array code, unrolled by 4, Different Associativity: Best: 1.00 (34%), Overall Best: 1.00 40-most: 1.01 cycles/element Double Sum unroll5aa: Array code, unrolled by 5, Different Associativity: Best: 1.00 (14%), Overall Best: 1.01 40-most: 1.01 cycles/element Double Sum unroll6aa: Array code, unrolled by 6, Different Associativity: Best: 1.00 (46%), Overall Best: 1.00 40-most: 1.01 cycles/element Double Sum unroll7aa: Array code, unrolled by 7, Different Associativity: Best: 1.00 (54%), Overall Best: 1.01 40-most: 1.01 cycles/element Double Sum unroll8aa: Array code, unrolled by 8, Different Associativity: Best: 0.99 (2%), Overall Best: 1.01 40-most: 1.01 cycles/element Double Sum unroll9aa: Array code, unrolled by 9, Different Associativity: Best: 1.00 (94%), Overall Best: 1.00 40-most: 1.00 cycles/element Double Sum unroll10aa: Array code, unrolled by 10, Different Associativity: Best: 1.00 (94%), Overall Best: 1.00 40-most: 1.00 cycles/element Double Sum unroll12aa: Array code, unrolled by 12, Different Associativity: Best: 1.00 (64%), Overall Best: 1.01 40-most: 1.01 cycles/element Double Sum simd_v1: SSE code, 1*VSIZE-way parallelism: Best: 0.75 (100%), Overall Best: 0.75 40-most: 0.75 cycles/element Double Sum simd_v2: SSE code, 2*VSIZE-way parallelism: Best: 0.37 (66%), Overall Best: 0.37 40-most: 0.38 cycles/element Double Sum simd_v4: SSE code, 4*VSIZE-way parallelism: Best: 0.25 (6%), Overall Best: 0.26 40-most: 0.26 cycles/element Double Sum simd_v8: SSE code, 8*VSIZE-way parallelism: Best: 0.24 (32%), Overall Best: 0.25 40-most: 0.25 cycles/element Double Sum simd_v12: SSE code, 12*VSIZE-way parallelism: Best: 0.22 (72%), Overall Best: 0.22 40-most: 0.23 cycles/element Double Sum simd_v2a: SSE code, 2*VSIZE-way parallelism, reassociate: Best: 0.37 (64%), Overall Best: 0.37 40-most: 0.38 cycles/element Double Sum simd_v4a: SSE code, 4*VSIZE-way parallelism, reassociate: Best: 0.25 (8%), Overall Best: 0.26 40-most: 0.26 cycles/element Double Sum simd_v8a: SSE code, 8*VSIZE-way parallelism, reassociate: Best: 0.24 (10%), Overall Best: 0.25 40-most: 1.05 cycles/element