LLVM Clang 3.8 Compiler Tuning Optimization Levels, "Timed HMMer Search 2.3.2 - Pfam Database Search", Lower Results Are Better "-O3 -march=native",15.84477686882,13.394789934158,15.741278171539,13.563045978546,14.605077028275,15.654445886612 "-O0",12.228904008865,12.223489999771,12.083644866943 "-O1",16.241715908051,15.614300966263,16.102246999741 "-O2",16.013282060623,13.323134899139,15.35317492485,14.367490053177,12.613070011139,12.436457872391 "-O3",14.868606090546,14.218637943268,15.564517974854,16.024136066437,15.613070964813,14.477026939392 "-Oz",13.826576948166,15.057579040527,15.583940029144,14.051455974579,15.189081907272,16.808954954147 "-Ofast",10.270697116852,11.713423013687,12.228662967682,8.4729540348053,11.679405927658,11.224199056625 "-Ofast -march=native",11.313512086868,12.724185943604,11.132174015045,9.9703500270844,14.349075078964,13.233157873154 "SciMark 2.0 - Computational Test: Composite", Higher Results Are Better "-O3 -march=native",1945.53,1912.24,1903.32,1912.11 "-O0",1817.35,1751.03,1796.22,1848.11 "-O1",1802.87,1770.74,1842.77,1812.33 "-O2",1781.6,1789.65,1834.06,1804.14 "-O3",1808.36,1832.41,1773.42,1759.8 "-Oz",1805.92,1797.59,1797.37,1847.84 "-Ofast",1795.28,1806.28,1831.72,1823.7 "-Ofast -march=native",1922.8,1893.68,1885.96,1871.92 "SciMark 2.0 - Computational Test: Monte Carlo", Higher Results Are Better "-O3 -march=native",243.02,234.14,222.22,242.94 "-O0",224.3,242.27,242.97,243.01 "-O1",222.22,243.01,243.05,243.05 "-O2",231.4,242.33,243.06,222.23 "-O3",242.34,243.02,222.23,242.92 "-Oz",222.23,240.14,243.04,243.02 "-Ofast",233.15,243.04,243.03,226.92 "-Ofast -march=native",243.06,243.06,222.23,242.96 "SciMark 2.0 - Computational Test: Fast Fourier Transform", Higher Results Are Better "-O3 -march=native",369.2,343.22,368.76,368.38 "-O0",364.55,363.2,363.25,342.13 "-O1",364.15,366.68,358.74,339.2 "-O2",365.21,366.36,360.01,362.79 "-O3",362,339.35,366.13,364.7 "-Oz",363.59,365.68,362.18,338.53 "-Ofast",365.5,365.75,347.43,363.47 "-Ofast -march=native",364.68,339.66,367.57,367.15 "SciMark 2.0 - Computational Test: Sparse Matrix Multiply", Higher Results Are Better "-O3 -march=native",2681.15,2676.29,2489.18,2608.47 "-O0",2874.72,2643.18,2845.16,2868.77 "-O1",2677.71,2697.81,2861.99,2868.49 "-O2",2655.87,2843.4,2847.89,2844.88 "-O3",2841,2849.36,2724.31,2651.46 "-Oz",2845.78,2669.15,2839.84,2871.71 "-Ofast",2657.47,2870.64,2848.81,2869.17 "-Ofast -march=native",2647.99,2641.85,2525.36,2467.2 "SciMark 2.0 - Computational Test: Dense LU Matrix Factorization", Higher Results Are Better "-O3 -march=native",4922.27,4924.93,4926.12,4830.82 "-O0",4241.02,3997.81,4020.28,4276.68 "-O1",4240.01,4036.48,4240.76,4233.2 "-O2",4144.09,3986.56,4209.18,4208.79 "-O3",4084.75,4220.54,4172.44,4030.65 "-Oz",4215.89,4203.62,4031.65,4276.4 "-Ofast",4208.64,4046.42,4209.32,4276.9 "-Ofast -march=native",4846.2,4861.08,4858.52,4772.18 "SciMark 2.0 - Computational Test: Jacobi Successive Over-Relaxation", Higher Results Are Better "-O3 -march=native",1512.02,1382.62,1510.31,1509.93 "-O0",1382.17,1508.69,1509.43,1509.99 "-O1",1510.25,1509.71,1509.31,1377.69 "-O2",1511.46,1509.59,1510.14,1382.02 "-O3",1511.72,1509.79,1381.98,1509.26 "-Oz",1382.1,1509.37,1510.14,1509.52 "-Ofast",1511.65,1505.57,1509.99,1382.02 "-Ofast -march=native",1512.07,1382.77,1456.12,1510.1 "GraphicsMagick 1.3.19 - Operation: Blur", Higher Results Are Better "-O3 -march=native",119,117,116 "-O0",67,67,67 "-O1",116,116,116 "-O2",119,118,119 "-O3",119,119,119 "-Oz",113,113,113 "-Ofast",118,117,119 "-Ofast -march=native",119,117,119 "GraphicsMagick 1.3.19 - Operation: Sharpen", Higher Results Are Better "-O3 -march=native",107,107,107 "-O0",61,61,61 "-O1",111,111,111 "-O2",113,113,113 "-O3",113,113,113 "-Oz",108,108,108 "-Ofast",109,109,109 "-Ofast -march=native",114,115,115 "GraphicsMagick 1.3.19 - Operation: HWB Color Space", Higher Results Are Better "-O3 -march=native",150,150,150 "-O0",83,84,83 "-O1",150,150,150 "-O2",150,150,150 "-O3",150,150,150 "-Oz",145,144,144 "-Ofast",150,150,150 "-Ofast -march=native",150,150,150 "GraphicsMagick 1.3.19 - Operation: Local Adaptive Thresholding", Higher Results Are Better "-O3 -march=native",84,84,84 "-O0",18,18,18 "-O1",70,70,70 "-O2",81,81,81 "-O3",80,80,80 "-Oz",71,71,71 "-Ofast",80,81,81 "-Ofast -march=native",84,84,84 "Himeno Benchmark 3.0 - Poisson Pressure Solver", Higher Results Are Better "-O3 -march=native",1344.008881,1341.463704,1343.348206 "-O0",288.179523,282.9023,282.645014 "-O1",1350.823292,1332.414857,1320.166818 "-O2",1372.08635,1355.999829,1348.951267 "-O3",1354.919277,1356.569996,1351.393228 "-Oz",999.175734,1007.776552,999.762714 "-Ofast",1408.498655,1380.661707,1381.546858 "-Ofast -march=native",1431.286159,1440.49574,1454.775169 "Timed Apache Compilation 2.4.7 - Time To Compile", Lower Results Are Better "-O3 -march=native",21.622854948044,21.828248023987,22.157680034637 "-O0",9.0093259811401,9.3203690052032,9.4172949790955 "-O1",18.042392969131,17.63513302803,17.819333076477 "-O2",20.904335021973,21.314656972885,21.590077161789 "-O3",21.78248000145,21.420482873917,21.810009002686 "-Oz",19.204663038254,19.17397403717,19.274176836014 "-Ofast",21.666231155396,21.369932174683,21.743825912476 "-Ofast -march=native",21.350221157074,21.710593938828,21.471973180771 "Timed PHP Compilation 5.2.9 - Time To Compile", Lower Results Are Better "-O3 -march=native",15.897835969925,16.044083118439,15.846698999405 "-O0",4.232528924942,4.241662979126,4.2315680980682 "-O1",8.9834728240967,8.9403579235077,8.8788199424744 "-O2",11.775436878204,11.784914016724,11.887505054474 "-O3",15.683440923691,15.879831075668,15.817921876907 "-Oz",9.5317277908325,9.525398015976,9.6057720184326 "-Ofast",15.66143488884,16.25589799881,15.813467979431 "-Ofast -march=native",16.141263961792,15.855218172073,16.226167201996 "C-Ray 1.1 - Total Time", Lower Results Are Better "-O3 -march=native",12.809,12.752,12.766 "-O0",27.598,27.602,27.545 "-O1",16.298,16.312,16.301 "-O2",19.824,19.802,19.813 "-O3",13.241,13.204,13.191 "-Oz",19.717,19.694,19.703 "-Ofast",12.375,12.348,12.337 "-Ofast -march=native",11.251,11.207,11.194 "Smallpt 1.0 - Global Illumination Renderer; 100 Samples", Lower Results Are Better "-O3 -march=native",12,12,12 "-O2",12,12,12 "-O3",12,12,12 "-Oz",13,13,13 "-Ofast",11,11,12,12,12,12 "-Ofast -march=native",11,12,11,12,11,12 "FLAC Audio Encoding 1.3.1 - WAV To FLAC", Lower Results Are Better "-O3 -march=native",7.0503859519958,7.0596151351929,7.0554430484772,7.1730761528015,7.2117280960083 "-O0",57.450082063675,57.529424905777,57.744197845459,57.598359823227,56.866177797318 "-O1",9.1597828865051,9.0298628807068,9.3414130210876,9.2948489189148,8.7839419841766 "-O2",8.7709419727325,8.6940660476685,8.2784700393677,8.6004769802094,8.8896980285645 "-O3",8.6369278430939,8.4233920574188,9.0826010704041,8.5604159832001,8.607675075531 "-Oz",12.37958407402,12.654793024063,11.805969953537,12.228950977325,12.289709091187 "-Ofast",8.835028886795,9.0545830726624,8.6633040904999,8.461776971817,8.7090411186218 "-Ofast -march=native",7.5537309646606,7.501247882843,7.4618289470673,7.5964150428772,7.3621640205383 "LAME MP3 Encoding 3.99.3 - WAV To MP3", Lower Results Are Better "-O3 -march=native",15.252796888351,15.045540809631,15.272962808609,15.451781988144,15.067126989365 "-O0",36.877848148346,36.827857017517,37.175889968872,37.340717077255,37.291465997696 "-O1",16.082883119583,15.217267990112,15.864181995392,15.243421077728,15.970076084137 "-O2",13.766086101532,14.251878976822,13.665806055069,13.867559194565,14.179408073425 "-O3",14.939597845078,13.88992190361,14.664334058762,13.880534172058,14.536852836609 "-Oz",17.242973804474,16.327626943588,17.323184013367,16.294052839279,17.232607841492 "-Ofast",13.913540124893,14.05297088623,14.222069978714,13.663049936295,14.629130840302 "-Ofast -march=native",15.103603124619,15.404547929764,15.143156051636,15.346503973007,15.003304004669 "PostgreSQL pgbench 9.4.3 - Scaling: Buffer Test - Test: Normal Load - Mode: Read Write", Higher Results Are Better "-O3 -march=native",4652.122528,5394.302853,4979.49257,5372.985994,4752.509305,5401.790153 "-O0",4872.447106,5091.704075,5059.099567 "-O1",4971.781725,5097.637778,5078.60823 "-O2",4807.309855,4976.002466,5120.98085 "-O3",4478.308484,4408.895412,4964.451901,4787.797902,4548.54905,4397.887452 "-Oz",4674.554123,4793.607232,4742.561327 "PostgreSQL pgbench 9.4.3 - Scaling: Buffer Test - Test: Single Thread - Mode: Read Write", Higher Results Are Better "-O3 -march=native",351.330645,354.593369,379.640338,364.246716,363.076943 "-O0",289.965415,287.113863,276.46087 "-O1",378.308077,354.327251,337.0379,339.861708,338.489229,345.116592 "-O2",377.55585,373.395065,386.041185 "-O3",354.510705,339.600957,361.134922 "-Oz",361.072354,363.715697,336.928689,362.450399,362.442092 "PostgreSQL pgbench 9.4.3 - Scaling: Buffer Test - Test: Heavy Contention - Mode: Read Write", Higher Results Are Better "-O3 -march=native",5531.983421,5197.457799,5562.034406,5011.68277,5193.74361,5555.992781 "-O0",5263.29172,5190.36842,5075.896266 "-O1",5231.671475,5232.203471,5163.376882 "-O2",5039.126487,5058.34699,5055.017699 "-O3",4714.478314,4681.695446,4493.981823 "-Oz",4921.075865,4693.166459,5070.323984,4959.853415 "Redis 3.0.1 - Test: LPOP", Higher Results Are Better "-O3 -march=native",638977.62,619962.81,615763.56 "-O0",549148.81,530785.56,544069.62 "-O1",639386.19,647249.19,642260.75 "-O2",641848.56,641436.81,615763.56 "-O3",651890.44,645994.81,630517.06 "-Oz",632111.25,619578.69,642260.75 "-Ofast",648088.12,645161.31,664010.62 "-Ofast -march=native",638977.62,613496.94,667111.44,623830.31,619195.06 "Redis 3.0.1 - Test: SADD", Higher Results Are Better "-O3 -march=native",603136.31,582072.19,578034.69 "-O0",487567,485672.66,472589.81 "-O1",583430.56,599520.38,578369 "-O2",591366.06,610873.56,594884 "-O3",592066.31,600961.5,585480.12 "-Oz",586510.25,593471.81,565610.88 "-Ofast",581057.56,611246.94,575043.12 "-Ofast -march=native",594530.31,602772.75,610873.56 "Redis 3.0.1 - Test: LPUSH", Higher Results Are Better "-O3 -march=native",592066.31,569800.56,563697.81 "-O0",439174.38,470588.25,448430.5,469263.25 "-O1",556483,575374,604960.69,589275.19,600240.06 "-O2",571428.56,582411.19,557103.06 "-O3",605326.88,584112.12,572737.69 "-Oz",610128.12,581733.56,575374 "-Ofast",588928.19,590318.75,608272.5 "-Ofast -march=native",600600.62,613120.75,559284.12,567859.19,600240.06,615006.12 "Redis 3.0.1 - Test: GET", Higher Results Are Better "-O3 -march=native",623441.44,645994.81,657894.75 "-O0",522739.16,532481.38,527983.06 "-O1",609756.12,645161.31,661375.69,616522.81,605693.5,613496.94 "-O2",612369.88,626174.06,635727.94 "-O3",666222.5,627352.56,653594.81 "-Oz",651890.44,610128.12,634517.75 "-Ofast",639386.19,611246.94,642260.75 "-Ofast -march=native",645161.31,614628.19,616522.81 "Redis 3.0.1 - Test: SET", Higher Results Are Better "-O3 -march=native",575043.12,600961.5,555555.56,589275.19 "-O0",451467.28,477326.97,475511.19 "-O1",569152,594530.31,561482.31 "-O2",591366.06,562113.56,585480.12 "-O3",591366.06,564971.75,592066.31 "-Oz",579374.31,582411.19,594530.31 "-Ofast",567859.19,558971.5,576036.88 "-Ofast -march=native",580383.06,571755.31,564334.12 "Hierarchical INTegration 1.0 - Test: FLOAT", Higher Results Are Better "-O3 -march=native",267001392.67469,269984163.71069,268744893.24141 "-O0",112082037.76411,113334634.02314,112247373.66237 "-O1",266873472.16557,266015583.73711,267582318.85327 "-O2",324023758.51196,319791489.77715,323318818.80385 "-O3",322489862.88754,321807123.01675,321360380.60934 "-Oz",316251389.76132,315585194.02548,311688878.45693 "-Ofast",297300717.23325,296676206.36798,300110738.49104 "-Ofast -march=native",251260433.36735,251510804.07002,251002043.60121 "Apache Benchmark 2.4.7 - Static Web Page Serving", Higher Results Are Better "-O3 -march=native",23328.11,23192.3,23545.96 "-O0",23055.84,22922.11,23086.3 "-O1",23485.43,23297.58,23357.68 "-O2",23234.67,23448.3,23399.57 "-O3",23196.77,23332.75,23319.68 "-Oz",23349.42,23301.01,23376.06 "-Ofast",23535.13,23434.76,23442.91 "-Ofast -march=native",22794.77,22570.71,22640.33