Rust sorting benchmark

bench.rs

#![feature(test)]
extern crate test;
use test::Bencher;

const RANDOM: [u32; 991] = [
	191, 921, 580, 230, 734, 714, 219, 974, 846, 100, 914, 887, 811, 978, 964, 909, 982, 309, 566, 775, 
	799, 357, 439, 468, 94, 332, 486, 465, 196, 464, 205, 109, 742, 242, 508, 766, 907, 928, 910, 353, 
	51, 311, 322, 840, 989, 911, 986, 541, 87, 633, 850, 399, 140, 482, 84, 220, 262, 945, 509, 702, 
	176, 625, 358, 496, 677, 527, 180, 435, 738, 168, 75, 691, 28, 12, 864, 381, 690, 400, 564, 296, 
	134, 862, 478, 638, 135, 128, 923, 737, 476, 361, 86, 349, 382, 53, 337, 172, 335, 300, 740, 939, 
	826, 849, 344, 190, 158, 870, 117, 238, 4, 320, 821, 3, 132, 570, 222, 583, 34, 199, 20, 281, 594, 
	875, 786, 145, 321, 955, 61, 647, 380, 55, 949, 710, 356, 668, 673, 637, 749, 572, 295, 386, 327, 
	403, 254, 43, 908, 411, 471, 90, 375, 318, 885, 628, 481, 704, 721, 597, 831, 890, 794, 848, 104, 
	777, 256, 904, 627, 653, 880, 234, 678, 975, 124, 682, 543, 417, 825, 441, 181, 200, 308, 936, 643, 
	54, 616, 444, 601, 706, 137, 537, 107, 683, 301, 769, 900, 767, 64, 377, 624, 590, 195, 529, 339, 
	340, 635, 929, 664, 11, 487, 726, 506, 736, 62, 0, 14, 528, 584, 843, 701, 798, 155, 944, 813, 71, 
	112, 233, 977, 258, 225, 640, 363, 759, 882, 40, 299, 446, 918, 602, 958, 867, 979, 886, 470, 85, 
	148, 297, 418, 520, 793, 772, 983, 655, 463, 500, 515, 161, 163, 620, 402, 383, 621, 938, 670, 147, 
	241, 789, 926, 709, 426, 373, 555, 672, 275, 934, 347, 379, 259, 571, 708, 453, 41, 556, 485, 350, 
	374, 618, 193, 245, 947, 671, 420, 364, 804, 105, 129, 99, 257, 688, 8, 784, 177, 745, 741, 310, 
	29, 206, 636, 593, 666, 23, 663, 574, 984, 459, 788, 612, 561, 952, 314, 317, 605, 901, 898, 770, 
	260, 552, 587, 24, 50, 44, 171, 159, 611, 454, 189, 315, 776, 352, 860, 728, 985, 782, 534, 236, 
	521, 845, 650, 941, 69, 578, 542, 164, 25, 568, 781, 822, 747, 526, 316, 66, 847, 897, 215, 932, 
	336, 103, 442, 550, 469, 951, 779, 925, 675, 646, 599, 265, 293, 888, 338, 720, 774, 833, 198, 838, 
	178, 472, 250, 313, 588, 538, 962, 421, 615, 858, 626, 116, 716, 903, 237, 972, 56, 857, 567, 505, 
	722, 405, 122, 648, 74, 990, 731, 88, 988, 812, 916, 700, 661, 497, 686, 306, 540, 70, 445, 502, 
	656, 154, 130, 203, 783, 623, 385, 517, 425, 59, 970, 600, 153, 968, 292, 698, 9, 727, 430, 269, 
	803, 865, 95, 387, 151, 965, 746, 679, 326, 610, 814, 562, 397, 768, 212, 711, 881, 214, 579, 30, 
	114, 536, 63, 920, 930, 680, 390, 532, 273, 378, 78, 16, 834, 545, 395, 557, 507, 167, 479, 674, 
	744, 530, 101, 884, 905, 150, 981, 366, 362, 139, 589, 694, 209, 428, 695, 935, 370, 733, 754, 771, 
	533, 221, 118, 341, 424, 895, 961, 303, 757, 927, 143, 707, 160, 267, 931, 953, 651, 248, 272, 665, 
	756, 72, 869, 342, 52, 819, 689, 592, 765, 519, 5, 806, 748, 96, 591, 408, 681, 270, 800, 899, 33, 
	298, 80, 516, 434, 152, 125, 458, 76, 810, 284, 253, 856, 495, 577, 863, 255, 60, 942, 676, 223, 
	971, 758, 282, 27, 462, 973, 328, 285, 548, 324, 126, 127, 304, 354, 778, 489, 659, 987, 83, 837, 
	65, 416, 276, 511, 685, 443, 607, 816, 415, 613, 654, 423, 412, 460, 31, 494, 185, 866, 455, 639, 
	474, 351, 815, 244, 851, 7, 345, 58, 138, 940, 432, 657, 226, 197, 184, 693, 603, 723, 251, 763, 
	286, 559, 131, 525, 622, 37, 492, 817, 629, 218, 82, 21, 47, 606, 808, 948, 896, 410, 872, 376, 894, 
	217, 730, 319, 705, 504, 617, 608, 937, 692, 645, 844, 111, 518, 861, 414, 761, 232, 287, 477, 17, 
	422, 355, 365, 174, 553, 827, 795, 859, 396, 712, 649, 22, 493, 231, 204, 743, 539, 854, 224, 290, 
	876, 717, 852, 980, 785, 933, 554, 956, 39, 842, 902, 121, 102, 294, 173, 755, 115, 660, 92, 289, 
	268, 391, 719, 924, 957, 732, 142, 263, 912, 280, 201, 735, 367, 524, 141, 229, 216, 498, 535, 194, 
	642, 146, 792, 873, 596, 312, 401, 98, 960, 585, 631, 751, 725, 598, 893, 753, 883, 49, 409, 868, 
	246, 274, 954, 213, 915, 718, 699, 243, 156, 696, 906, 752, 97, 582, 575, 333, 136, 619, 467, 652, 
	809, 879, 828, 110, 523, 609, 889, 368, 93, 832, 15, 283, 325, 73, 369, 291, 630, 10, 113, 503, 228, 
	36, 724, 787, 839, 558, 641, 919, 892, 165, 501, 878, 427, 207, 644, 429, 488, 26, 323, 801, 192, 
	697, 407, 48, 144, 388, 343, 450, 959, 713, 119, 123, 77, 264, 544, 480, 438, 182, 419, 715, 186, 
	513, 836, 473, 576, 42, 547, 35, 563, 157, 278, 512, 510, 764, 750, 288, 2, 162, 227, 393, 448, 133, 
	484, 569, 662, 202, 950, 581, 491, 703, 522, 922, 252, 89, 81, 413, 573, 546, 13, 820, 802, 440, 
	106, 684, 46, 302, 841, 780, 560, 490, 791, 796, 372, 963, 614, 565, 183, 797, 807, 398, 456, 586, 
	18, 874, 595, 120, 531, 835, 634, 433, 632, 687, 277, 240, 855, 913, 235, 239, 57, 307, 169, 499, 
	210, 384, 91, 877, 943, 457, 976, 669, 969, 891, 166, 179, 451, 68, 208, 437, 108, 305, 406, 773, 
	967, 45, 38, 187, 824, 829, 346, 271, 360, 211, 436, 917, 394, 6, 359, 334, 729, 760, 329, 431, 247, 
	175, 739, 551, 475, 805, 966, 762, 330, 392, 79, 279, 266, 667, 19, 404, 790, 818, 549, 461, 331, 
	823, 853, 371, 871, 830, 389, 188, 447, 658, 149, 32, 483, 452, 261, 67, 946, 348, 466, 1, 170, 514, 
	604, 449, 249, 
];

#[bench]
fn random_unstable(b: &mut Bencher) {
	b.iter(|| Vec::from(RANDOM).sort_unstable());
}

#[bench]
fn random_stable(b: &mut Bencher) {
	b.iter(|| Vec::from(RANDOM).sort());
}

// Scenario: we receive some additional values, that we add to the end of the Vec before re-sorting.
const APPEND: [u32; 991] = [
	1, 3, 4, 6, 7, 8, 10, 11, 12, 13, 15, 16, 17, 18, 19, 21, 22, 23, 24, 25, 26, 28, 29, 30, 31, 32, 
	33, 34, 36, 37, 38, 39, 40, 41, 42, 43, 45, 46, 47, 48, 49, 50, 51, 52, 53, 55, 56, 57, 58, 59, 60, 
	61, 62, 63, 64, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 
	88, 89, 91, 92, 93, 94, 95, 96, 97, 98, 99, 100, 101, 102, 103, 105, 106, 107, 108, 109, 110, 111, 
	112, 113, 114, 115, 116, 117, 118, 120, 121, 122, 123, 124, 125, 126, 127, 128, 129, 130, 131, 132, 
	133, 134, 136, 137, 138, 139, 140, 141, 142, 143, 144, 145, 146, 147, 148, 149, 150, 151, 153, 154, 
	155, 156, 157, 158, 159, 160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 171, 172, 173, 174, 175, 
	176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 190, 191, 192, 193, 194, 195, 196, 
	197, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207, 208, 210, 211, 212, 213, 214, 215, 216, 217, 
	218, 219, 220, 221, 222, 223, 224, 225, 226, 227, 228, 229, 231, 232, 233, 234, 235, 236, 237, 238, 
	239, 240, 241, 242, 243, 244, 245, 246, 247, 248, 249, 250, 251, 253, 254, 255, 256, 257, 258, 259, 
	260, 261, 262, 263, 264, 265, 266, 267, 268, 269, 270, 271, 272, 273, 274, 276, 277, 278, 279, 280, 
	281, 282, 283, 284, 285, 286, 287, 288, 289, 290, 291, 292, 293, 294, 295, 296, 297, 298, 300, 301, 
	302, 303, 304, 305, 306, 307, 308, 309, 310, 311, 312, 313, 314, 315, 316, 317, 318, 319, 320, 321, 
	322, 323, 325, 326, 327, 328, 329, 330, 331, 332, 333, 334, 335, 336, 337, 338, 339, 340, 341, 342, 
	343, 344, 345, 346, 347, 348, 349, 351, 352, 353, 354, 355, 356, 357, 358, 359, 360, 361, 362, 363, 
	364, 365, 366, 367, 368, 369, 370, 371, 372, 373, 374, 375, 376, 378, 379, 380, 381, 382, 383, 384, 
	385, 386, 387, 388, 389, 390, 391, 392, 393, 394, 395, 396, 397, 398, 399, 400, 401, 402, 403, 404, 
	406, 407, 408, 409, 410, 411, 412, 413, 414, 415, 416, 417, 418, 419, 420, 421, 422, 423, 424, 425, 
	426, 427, 428, 429, 430, 431, 432, 433, 435, 436, 437, 438, 439, 440, 441, 442, 443, 444, 445, 446, 
	447, 448, 449, 450, 451, 452, 453, 454, 455, 456, 457, 458, 459, 460, 461, 462, 463, 465, 466, 467, 
	468, 469, 470, 471, 472, 473, 474, 475, 476, 477, 478, 479, 480, 481, 482, 483, 484, 485, 486, 487, 
	488, 489, 490, 491, 492, 493, 494, 496, 497, 498, 499, 500, 501, 502, 503, 504, 505, 506, 507, 508, 
	509, 510, 511, 512, 513, 514, 515, 516, 517, 518, 519, 520, 521, 522, 523, 524, 525, 526, 528, 529, 
	530, 531, 532, 533, 534, 535, 536, 537, 538, 539, 540, 541, 542, 543, 544, 545, 546, 547, 548, 549, 
	550, 551, 552, 553, 554, 555, 556, 557, 558, 559, 561, 562, 563, 564, 565, 566, 567, 568, 569, 570, 
	571, 572, 573, 574, 575, 576, 577, 578, 579, 580, 581, 582, 583, 584, 585, 586, 587, 588, 589, 590, 
	591, 592, 593, 595, 596, 597, 598, 599, 600, 601, 602, 603, 604, 605, 606, 607, 608, 609, 610, 611, 
	612, 613, 614, 615, 616, 617, 618, 619, 620, 621, 622, 623, 624, 625, 626, 627, 628, 630, 631, 632, 
	633, 634, 635, 636, 637, 638, 639, 640, 641, 642, 643, 644, 645, 646, 647, 648, 649, 650, 651, 652, 
	653, 654, 655, 656, 657, 658, 659, 660, 661, 662, 663, 664, 666, 667, 668, 669, 670, 671, 672, 673, 
	674, 675, 676, 677, 678, 679, 680, 681, 682, 683, 684, 685, 686, 687, 688, 689, 690, 691, 692, 693, 
	694, 695, 696, 697, 698, 699, 700, 701, 703, 704, 705, 706, 707, 708, 709, 710, 711, 712, 713, 714, 
	715, 716, 717, 718, 719, 720, 721, 722, 723, 724, 725, 726, 727, 728, 729, 730, 731, 732, 733, 734, 
	735, 736, 737, 738, 739, 741, 742, 743, 744, 745, 746, 747, 748, 749, 750, 751, 752, 753, 754, 755, 
	756, 757, 758, 759, 760, 761, 762, 763, 764, 765, 766, 767, 768, 769, 770, 771, 772, 773, 774, 775, 
	776, 777, 778, 780, 781, 782, 783, 784, 785, 786, 787, 788, 789, 790, 791, 792, 793, 794, 795, 796, 
	797, 798, 799, 800, 801, 802, 803, 804, 805, 806, 807, 808, 809, 810, 811, 812, 813, 814, 815, 816, 
	817, 818, 820, 821, 822, 823, 824, 825, 826, 827, 828, 829, 830, 831, 832, 833, 834, 835, 836, 837, 
	838, 839, 840, 841, 842, 843, 844, 845, 846, 847, 848, 849, 850, 851, 852, 853, 854, 855, 856, 857, 
	858, 859, 861, 862, 863, 864, 865, 866, 867, 868, 869, 870, 871, 872, 873, 874, 875, 876, 877, 878, 
	879, 880, 881, 882, 883, 884, 885, 886, 887, 888, 889, 890, 891, 892, 893, 894, 895, 896, 897, 898, 
	899, 900, 901, 903, 904, 905, 906, 907, 908, 909, 910, 911, 912, 913, 914, 915, 916, 917, 918, 919, 
	920, 921, 922, 923, 924, 925, 926, 927, 928, 929, 930, 931, 932, 933, 934, 935, 936, 937, 938, 939, 
	940, 941, 942, 943, 944, 946, 947, 948, 949, 950, 951, 952, 953, 954, 955, 956, 957, 958, 959, 960, 
	961, 962, 963, 964, 965, 966, 967, 968, 969, 970, 971, 972, 973, 974, 975, 976, 977, 978, 979, 980, 
	981, 982, 983, 984, 985, 986, 987, 988, 990, 0, 2, 5, 9, 14, 20, 27, 35, 44, 54, 65, 77, 90, 104, 
	119, 135, 152, 170, 189, 209, 230, 252, 275, 299, 324, 350, 377, 405, 434, 464, 495, 527, 560, 594, 
	629, 665, 702, 740, 779, 819, 860, 902, 945, 989, 
];

#[bench]
fn append_unstable(b: &mut Bencher) {
	b.iter(|| Vec::from(APPEND).sort_unstable());
}

#[bench]
fn append_stable(b: &mut Bencher) {
	b.iter(|| Vec::from(APPEND).sort());
}

// Scenario: values arrive almost sorted e.g. timestamps from distributed events.
const ALMOST_SORTED: [u32; 991] = [
	0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 90, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 756, 26, 
	27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 605, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 
	51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 724, 73, 74, 
	75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 12, 91, 92, 93, 94, 95, 96, 97, 98, 99, 
	100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 112, 113, 114, 115, 116, 117, 118, 119, 
	120, 121, 122, 123, 654, 125, 126, 127, 128, 129, 130, 131, 132, 703, 134, 135, 136, 137, 138, 139, 
	140, 141, 576, 143, 144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159, 
	560, 161, 162, 163, 164, 165, 166, 167, 168, 169, 244, 171, 172, 173, 174, 175, 176, 177, 178, 179, 
	180, 181, 182, 183, 792, 185, 186, 869, 965, 189, 190, 191, 192, 193, 194, 195, 196, 197, 198, 199, 
	200, 201, 202, 203, 204, 205, 206, 207, 208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 
	220, 221, 222, 223, 224, 225, 226, 227, 228, 229, 230, 231, 232, 233, 234, 235, 236, 237, 238, 239, 
	240, 241, 242, 243, 170, 245, 246, 247, 248, 249, 250, 510, 252, 253, 254, 255, 256, 257, 258, 259, 
	260, 352, 262, 263, 264, 265, 266, 267, 268, 269, 270, 271, 272, 273, 274, 275, 276, 277, 278, 279, 
	280, 281, 282, 283, 284, 285, 286, 287, 288, 289, 290, 291, 621, 293, 294, 295, 296, 297, 298, 299, 
	300, 301, 302, 303, 304, 305, 306, 307, 308, 309, 310, 311, 312, 313, 314, 315, 461, 317, 318, 319, 
	320, 321, 322, 323, 977, 325, 326, 327, 328, 329, 330, 331, 332, 333, 334, 335, 336, 872, 338, 339, 
	340, 341, 342, 343, 344, 345, 346, 347, 348, 349, 350, 351, 261, 353, 354, 355, 356, 357, 358, 359, 
	360, 361, 362, 363, 364, 365, 366, 367, 368, 369, 370, 371, 372, 373, 374, 375, 376, 377, 378, 379, 
	380, 381, 382, 383, 384, 385, 386, 387, 388, 389, 390, 391, 392, 393, 394, 395, 396, 397, 398, 399, 
	400, 401, 402, 403, 404, 405, 406, 407, 408, 409, 410, 411, 412, 413, 414, 415, 416, 417, 418, 419, 
	420, 421, 422, 423, 424, 425, 426, 427, 428, 429, 430, 431, 432, 433, 434, 435, 436, 437, 438, 439, 
	440, 441, 442, 443, 444, 445, 446, 447, 448, 449, 450, 451, 452, 453, 454, 635, 456, 689, 458, 459, 
	460, 316, 871, 463, 464, 465, 466, 467, 468, 831, 470, 471, 472, 473, 474, 475, 476, 477, 478, 479, 
	480, 481, 482, 483, 484, 485, 486, 487, 488, 489, 490, 928, 492, 493, 494, 495, 496, 497, 498, 499, 
	500, 501, 502, 503, 504, 505, 506, 507, 508, 509, 251, 511, 512, 513, 514, 515, 516, 517, 843, 519, 
	520, 521, 522, 523, 524, 525, 526, 527, 528, 529, 530, 531, 532, 533, 534, 535, 536, 537, 538, 539, 
	540, 541, 542, 543, 544, 545, 546, 547, 548, 549, 550, 551, 552, 553, 554, 555, 556, 557, 558, 559, 
	160, 561, 562, 563, 564, 565, 566, 567, 568, 569, 570, 571, 572, 573, 574, 575, 142, 577, 578, 579, 
	580, 581, 582, 583, 584, 585, 640, 587, 588, 589, 590, 591, 592, 593, 594, 595, 596, 597, 598, 599, 
	600, 601, 602, 603, 604, 39, 606, 607, 608, 609, 610, 611, 612, 613, 614, 615, 616, 617, 618, 619, 
	620, 292, 622, 623, 624, 625, 626, 627, 628, 629, 630, 978, 632, 633, 634, 455, 636, 637, 638, 639, 
	586, 641, 642, 643, 644, 645, 646, 647, 648, 649, 650, 651, 652, 653, 124, 655, 656, 657, 658, 659, 
	660, 661, 662, 663, 664, 780, 666, 667, 668, 669, 670, 671, 672, 673, 674, 675, 676, 677, 678, 679, 
	680, 681, 682, 683, 684, 685, 686, 687, 688, 457, 690, 691, 692, 693, 694, 695, 696, 697, 698, 699, 
	700, 701, 702, 133, 704, 705, 706, 707, 708, 709, 710, 711, 712, 713, 714, 715, 716, 717, 718, 719, 
	720, 721, 722, 723, 72, 725, 726, 727, 728, 729, 730, 731, 732, 733, 734, 735, 736, 737, 738, 739, 
	740, 741, 742, 743, 744, 904, 746, 747, 748, 749, 750, 751, 752, 753, 754, 755, 25, 757, 758, 759, 
	760, 761, 762, 763, 764, 765, 766, 767, 768, 769, 770, 771, 772, 773, 774, 775, 776, 777, 778, 779, 
	665, 781, 956, 783, 784, 785, 791, 787, 788, 789, 790, 786, 184, 793, 794, 795, 796, 797, 798, 799, 
	800, 801, 802, 803, 804, 805, 806, 807, 808, 809, 810, 811, 812, 813, 814, 815, 816, 817, 818, 819, 
	820, 821, 822, 823, 824, 825, 826, 827, 828, 829, 830, 469, 832, 946, 834, 835, 836, 837, 838, 839, 
	840, 841, 842, 518, 844, 845, 846, 847, 848, 849, 850, 851, 852, 853, 854, 855, 856, 870, 858, 859, 
	860, 861, 862, 863, 864, 865, 866, 867, 868, 187, 857, 462, 337, 873, 874, 875, 876, 877, 878, 879, 
	880, 881, 882, 883, 884, 885, 886, 887, 888, 889, 890, 891, 892, 893, 894, 895, 896, 897, 898, 899, 
	900, 901, 902, 903, 745, 905, 906, 907, 908, 909, 910, 911, 912, 913, 914, 915, 916, 917, 918, 919, 
	920, 921, 922, 923, 924, 925, 926, 927, 491, 929, 930, 931, 932, 933, 934, 935, 936, 937, 938, 939, 
	940, 941, 942, 943, 944, 945, 833, 947, 948, 949, 950, 951, 952, 953, 954, 955, 782, 957, 958, 959, 
	960, 961, 962, 963, 964, 188, 966, 967, 968, 969, 970, 971, 972, 973, 974, 975, 976, 324, 631, 979, 
	980, 981, 982, 983, 984, 985, 986, 987, 988, 989, 990, 
];

#[bench]
fn almost_sorted_unstable(b: &mut Bencher) {
	b.iter(|| Vec::from(ALMOST_SORTED).sort_unstable());
}

#[bench]
fn almost_sorted_stable(b: &mut Bencher) {
	b.iter(|| Vec::from(ALMOST_SORTED).sort());
}

gistfile1.txt

running 6 tests
test almost_sorted_stable   ... bench:      12,290 ns/iter (+/- 97)
test almost_sorted_unstable ... bench:       3,392 ns/iter (+/- 74)
test append_stable          ... bench:       2,545 ns/iter (+/- 19)
test append_unstable        ... bench:       8,450 ns/iter (+/- 236)
test random_stable          ... bench:      16,803 ns/iter (+/- 396)
test random_unstable        ... bench:       6,149 ns/iter (+/- 156)