Double Sum combine1: Maximum use of data abstraction: Best: 9.68 (2%), Overall Best: 9.74 40-most: 9.86 cycles/element Double Sum combine2: Take vec_length() out of loop: Best: 8.85 (2%), Overall Best: 8.85 40-most: 9.02 cycles/element Double Sum combine3: Array reference to vector data: Best: 3.93 (2%), Overall Best: 3.93 40-most: 4.01 cycles/element Double Sum combine3w: Update *dest within loop only with write: Best: 3.94 (4%), Overall Best: 3.94 40-most: 4.01 cycles/element Double Sum combine4: Array reference, accumulate in temporary: Best: 3.93 (2%), Overall Best: 3.93 40-most: 4.01 cycles/element Double Sum combine4b: Include bonds check in loop: Best: 3.93 (4%), Overall Best: 3.93 40-most: 4.01 cycles/element Double Sum combine4p: Pointer reference, accumulate in temporary: Best: 3.93 (2%), Overall Best: 3.93 40-most: 4.01 cycles/element Double Sum combine5: Array code, unrolled by 2: Best: 3.94 (6%), Overall Best: 3.94 40-most: 4.01 cycles/element Double Sum combine5p: Pointer code, unrolled by 2, for loop: Best: 3.93 (2%), Overall Best: 3.93 40-most: 4.01 cycles/element Double Sum unroll2aw: Array code, unrolled by 2, while loop: Best: 3.93 (2%), Overall Best: 3.93 40-most: 4.01 cycles/element Double Sum unroll3a: Array code, unrolled by 3: Best: 3.93 (2%), Overall Best: 3.93 40-most: 4.01 cycles/element Double Sum unroll4a: Array code, unrolled by 4: Best: 3.93 (2%), Overall Best: 3.94 40-most: 4.01 cycles/element Double Sum unroll5a: Array code, unrolled by 5: Best: 3.93 (2%), Overall Best: 3.93 40-most: 4.01 cycles/element Double Sum unroll6a: Array code, unrolled by 6: Best: 3.93 (4%), Overall Best: 3.93 40-most: 4.01 cycles/element Double Sum unroll7a: Array code, unrolled by 7: Best: 3.94 (4%), Overall Best: 3.94 40-most: 4.01 cycles/element Double Sum unroll8a: Array code, unrolled by 8: Best: 3.93 (2%), Overall Best: 3.93 40-most: 4.01 cycles/element Double Sum unroll9a: Array code, unrolled by 9: Best: 3.93 (2%), Overall Best: 3.93 40-most: 4.01 cycles/element Double Sum unroll10a: Array code, unrolled by 10: Best: 3.93 (2%), Overall Best: 3.93 40-most: 4.01 cycles/element Double Sum unroll16a: Array code, unrolled by 16: Best: 3.93 (2%), Overall Best: 3.93 40-most: 4.01 cycles/element Double Sum unroll2: Pointer code, unrolled by 2: Best: 3.93 (2%), Overall Best: 3.93 40-most: 4.01 cycles/element Double Sum unroll3: Pointer code, unrolled by 3: Best: 3.93 (2%), Overall Best: 3.93 40-most: 4.01 cycles/element Double Sum unroll4: Pointer code, unrolled by 4: Best: 3.93 (2%), Overall Best: 3.93 40-most: 4.01 cycles/element Double Sum unroll8: Pointer code, unrolled by 8: Best: 3.93 (4%), Overall Best: 3.93 40-most: 4.01 cycles/element Double Sum unroll16: Pointer code, unrolled by 16: Best: 3.93 (2%), Overall Best: 3.93 40-most: 4.01 cycles/element Double Sum combine6: Array code, unrolled by 2, Superscalar x2: Best: 1.97 (8%), Overall Best: 1.97 40-most: 2.00 cycles/element Double Sum unroll4x2a: Array code, unrolled by 4, Superscalar x2: Best: 1.97 (8%), Overall Best: 1.97 40-most: 2.00 cycles/element Double Sum unroll8x2a: Array code, unrolled by 8, Superscalar x2: Best: 1.97 (6%), Overall Best: 1.97 40-most: 2.00 cycles/element Double Sum unroll3x3a: Array code, unrolled by 3, Superscalar x3: Best: 1.31 (4%), Overall Best: 1.31 40-most: 1.34 cycles/element Double Sum unroll4x4a: Array code, unrolled by 4, Superscalar x4: Best: 0.98 (4%), Overall Best: 0.98 40-most: 1.00 cycles/element Double Sum unroll5x5a: Array code, unrolled by 5, Superscalar x5: Best: 0.80 (2%), Overall Best: 0.81 40-most: 0.82 cycles/element Double Sum unroll6x6a: Array code, unrolled by 6, Superscalar x6: Best: 0.68 (12%), Overall Best: 0.68 40-most: 0.70 cycles/element Double Sum unroll7x7a: Array code, unrolled by 7, Superscalar x7: Best: 0.61 (10%), Overall Best: 0.61 40-most: 0.62 cycles/element Double Sum unroll8x4a: Array code, unrolled by 8, Superscalar x4: Best: 0.98 (2%), Overall Best: 0.99 40-most: 1.00 cycles/element Double Sum unroll8x8a: Array code, unrolled by 8, Superscalar x8: Best: 0.54 (2%), Overall Best: 0.55 40-most: 0.56 cycles/element Double Sum unroll9x9a: Array code, unrolled by 9, Superscalar x9: Best: 0.53 (36%), Overall Best: 0.53 40-most: 0.54 cycles/element Double Sum unroll10x10a: Array code, unrolled by 10, Superscalar x10: Best: 0.52 (6%), Overall Best: 0.52 40-most: 0.54 cycles/element Double Sum unroll2x6a: Array code, unrolled by 12, Superscalar x6: Best: 0.68 (10%), Overall Best: 0.68 40-most: 0.70 cycles/element Double Sum unroll12x12a: Array code, unrolled by 12, Superscalar x12: Best: 0.52 (6%), Overall Best: 0.53 40-most: 0.54 cycles/element Double Sum unroll16x16a: Array code, unrolled by 16, Superscalar x16: Best: 0.52 (14%), Overall Best: 0.52 40-most: 0.53 cycles/element Double Sum unroll20x20a: Array code, unrolled by 20, Superscalar x20: Best: 0.68 (48%), Overall Best: 0.68 40-most: 0.69 cycles/element Double Sum unroll8x2: Pointer code, unrolled by 8, Superscalar x2: Best: 1.97 (4%), Overall Best: 1.97 40-most: 2.00 cycles/element Double Sum unroll8x4: Pointer code, unrolled by 8, Superscalar x4: Best: 0.98 (4%), Overall Best: 0.99 40-most: 1.00 cycles/element Double Sum unroll8x8: Pointer code, unrolled by 8, Superscalar x8: Best: 0.56 (8%), Overall Best: 0.57 40-most: 0.58 cycles/element Double Sum unroll9x3: Pointer code, unrolled by 9, Superscalar x3: Best: 1.31 (8%), Overall Best: 1.31 40-most: 1.33 cycles/element Double Sum unrollx2as: Array code, Unroll x2, Superscalar x2, noninterleaved: Best: 1.97 (6%), Overall Best: 1.97 40-most: 2.00 cycles/element Double Sum combine7: Array code, unrolled by 2, different associativity: Best: 1.96 (2%), Overall Best: 1.96 40-most: 2.00 cycles/element Double Sum unroll3aa: Array code, unrolled by 3, Different Associativity: Best: 1.31 (4%), Overall Best: 1.31 40-most: 1.34 cycles/element Double Sum unroll4aa: Array code, unrolled by 4, Different Associativity: Best: 0.98 (2%), Overall Best: 0.99 40-most: 1.00 cycles/element Double Sum unroll5aa: Array code, unrolled by 5, Different Associativity: Best: 0.79 (12%), Overall Best: 0.79 40-most: 0.81 cycles/element Double Sum unroll6aa: Array code, unrolled by 6, Different Associativity: Best: 0.66 (6%), Overall Best: 0.67 40-most: 0.68 cycles/element Double Sum unroll7aa: Array code, unrolled by 7, Different Associativity: Best: 0.57 (10%), Overall Best: 0.58 40-most: 0.59 cycles/element Double Sum unroll8aa: Array code, unrolled by 8, Different Associativity: Best: 0.54 (6%), Overall Best: 0.54 40-most: 0.56 cycles/element Double Sum unroll9aa: Array code, unrolled by 9, Different Associativity: Best: 0.56 (4%), Overall Best: 0.58 40-most: 0.59 cycles/element Double Sum unroll10aa: Array code, unrolled by 10, Different Associativity: Best: 0.55 (32%), Overall Best: 0.57 40-most: 0.57 cycles/element Double Sum unroll12aa: Array code, unrolled by 12, Different Associativity: Best: 0.58 (36%), Overall Best: 0.60 40-most: 0.60 cycles/element Double Sum simd_v1: SSE code, 1*VSIZE-way parallelism: Best: 0.99 (6%), Overall Best: 0.99 40-most: 1.01 cycles/element Double Sum simd_v2: SSE code, 2*VSIZE-way parallelism: Best: 0.49 (18%), Overall Best: 0.49 40-most: 0.50 cycles/element Double Sum simd_v4: SSE code, 4*VSIZE-way parallelism: Best: 0.24 (44%), Overall Best: 0.24 40-most: 0.25 cycles/element Double Sum simd_v8: SSE code, 8*VSIZE-way parallelism: Best: 0.13 (20%), Overall Best: 0.14 40-most: 0.14 cycles/element Double Sum simd_v10: SSE code, 10*VSIZE-way parallelism: Best: 0.15 (50%), Overall Best: 0.15 40-most: 0.16 cycles/element Double Sum simd_v12: SSE code, 12*VSIZE-way parallelism: Best: 0.10 (48%), Overall Best: 0.10 40-most: 0.11 cycles/element Double Sum simd_v2a: SSE code, 2*VSIZE-way parallelism, reassociate: Best: 0.49 (6%), Overall Best: 0.50 40-most: 0.50 cycles/element Double Sum simd_v4a: SSE code, 4*VSIZE-way parallelism, reassociate: Best: 0.23 (14%), Overall Best: 0.24 40-most: 0.24 cycles/element Double Sum simd_v8a: SSE code, 8*VSIZE-way parallelism, reassociate: Best: 0.12 (6%), Overall Best: 0.13 40-most: 0.15 cycles/element