test/fp-speed-1.c

   1 /*
   2 ** Performance testing of floating-point binary-to-decimal conversion for
   3 ** SQLite versus the standard library.
   4 **
   5 ** To compile:
   6 **
   7 **    make sqlite3.c
   8 **    gcc -Os -c sqlite3.c
   9 **    gcc -I. -Os test/fp-speed-1.c sqlite3.o -ldl -lm -lpthread
  10 **
  11 ** To run the test:
  12 **
  13 **    time ./a.out 0 10000000     <-- standard library
  14 **    time ./a.out 1 10000000     <-- SQLite
  15 **    time ./a.out 2 10000000     <-- SQLite with long-double disabled
  16 */
  17 static double aVal[] = {
  18   -1.0163830486285643089e+063,
  19   +0.0049243807391586981e-019,
  20   +7.3818732407343994867e-095,
  21   +7.0678595219225717143e+000,
  22   +9.2807266319850025655e+120,
  23   +5.8871050861933394663e+135,
  24   -2.2998023621259662805e-168,
  25   -1.5903581924910847482e+181,
  26   +2.4313441816844978216e-001,
  27   -3.8290987328945399091e-147,
  28   +1.8787914062744001349e-009,
  29   +0.7270653560487146653e-014,
  30   +0.0639577697913183665e+107,
  31   +5.2292338879315861930e-103,
  32   +6.3747682672872231319e-021,
  33   +8.6972339538329106984e-129,
  34   -9.5074486051597691937e-026,
  35   -8.6480257845368753018e-005,
  36   -3.5657595775797470332e+017,
  37   -7.8323106179731761351e+161,
  38   +7.7813875274120800372e+077,
  39   -1.8739718928360196596e-050,
  40   +8.6898145915593357218e-051,
  41   +6.0566766359877837871e+002,
  42   +4.1703379217148160678e+199,
  43   +2.1283871288746651560e+150,
  44   -6.8395236083891810637e+128,
  45   -6.2114299763939529155e-147,
  46   -2.0753525742614637350e-149,
  47   +5.8727459803944290257e-007,
  48   +8.5888991062002101817e+010,
  49   +6.8624461031355917632e+026,
  50   -3.3053986756670905167e-075,
  51   -4.3596843152763444945e-108,
  52   +0.0834139520104099673e+098,
  53   -8.8581986548904222440e-192,
  54   -3.6622095428727698202e+038,
  55   -6.6965852297025063260e+005,
  56   +1.8204169347406488441e-054,
  57   +6.5234508038649000384e-065,
  58   +1.5923006018219011453e+083,
  59   +1.7362555291656389480e+018,
  60   +7.2875431976854785882e+160,
  61   +1.2835880105958926748e-146,
  62   +8.0516253320320819420e-113,
  63   +6.6324633399381145440e-030,
  64   -1.7126500070280062058e-149,
  65   +1.6995738341583712335e+042,
  66   +7.6048766923738663725e-112,
  67   +0.6159117235449455043e-004,
  68   +5.7544894355415943289e-135,
  69   +8.2970228592690581890e-023,
  70   -6.5531925360163067447e+020,
  71   +5.8321334606187030050e+120,
  72   +5.6557166509571891727e+095,
  73   +0.3322789708438408704e-114,
  74   -7.1210648776698686623e-050,
  75   -9.6721262526706343301e+179,
  76   -3.4583916571377395084e-106,
  77   +4.7896094323214750793e-172,
  78   -9.6926028040004137875e-056,
  79   +7.0683848275381385483e-198,
  80   -5.2970114182162961964e-007,
  81   -4.4287021200905393271e-170,
  82   +0.0728891155732808799e-189,
  83   -9.1855462025879447465e+175,
  84   +3.7294126234131007796e+015,
  85   +2.6857421882792719241e+003,
  86   -4.7070607333624685339e+039,
  87   +7.2175820768279334274e+136,
  88   -8.3678412534261163481e-115,
  89   +2.2174844304241822163e+019,
  90   +0.1949824588606861016e+112,
  91   -9.7334052955672071912e+151,
  92   -9.7793887766936999879e-142,
  93   -5.1561164587416931561e+139,
  94   -7.5048993577765174789e-022,
  95   +7.3556076568687784568e+107,
  96   -5.0681628575533599865e-144,
  97   +1.5209705642027747811e+165,
  98   -7.5989782535048296040e-101,
  99   +1.3654137203389775871e-016,
 100   -1.6441720554651372066e+087,
 101   -4.9042433196141125923e+000,
 102   -7.7063611961649130777e+118,
 103   +0.1699427460930766201e+174,
 104   +8.3374317849572216870e-145,
 105   -5.2355330480469580072e+081,
 106   -3.8510045942194147919e+141,
 107   -6.3513622544326339887e-147,
 108   +2.3869303484454428988e+049,
 109   +3.8352715871620360268e-165,
 110   -3.1263120493136887902e+035,
 111   -5.5794797002556490823e+051,
 112   -8.8109874479595604379e+142,
 113   -4.3727360120203216922e+070,
 114   -3.1109951189668539974e+170,
 115   -9.4841878031704268232e+011,
 116   -3.7398451668304407277e+067,
 117   +4.8984042008915959963e-091,
 118 };
 119 #define NN (sizeof(aVal)/sizeof(aVal[0]))
 120
 121 #include "sqlite3.h"
 122 #include <stdio.h>
 123 #include <stdlib.h>
 124
 125 int main(int argc, char **argv){
 126   int i;
 127   int cnt;
 128   int fg;
 129   char zBuf[1000];
 130
 131   if( argc!=3 ){
 132     fprintf(stderr, "Usage:  %s FLAG COUNT\n", argv[0]);
 133     return 1;
 134   }
 135   cnt = atoi(argv[2]);
 136   fg = atoi(argv[1]);
 137
 138   switch( fg % 3 ){
 139     case 0: {
 140       printf("Doing %d calls to C-lib sprintf()\n", cnt);
 141       for(i=0; i<cnt; i++){
 142         sprintf(zBuf, "%.26g", aVal[i%NN]);
 143       }
 144       break;
 145     }
 146     case 1: {
 147       printf("Doing %d calls to sqlite3_snprintf()\n", cnt);
 148       for(i=0; i<cnt; i++){
 149         sqlite3_snprintf(sizeof(zBuf), zBuf, "%!.26g", aVal[i%NN]);
 150       }
 151       break;
 152     }
 153     case 2: {
 154       printf("Doing %d calls to sqlite3_snprintf() without long double\n", cnt);
 155       sqlite3_test_control(SQLITE_TESTCTRL_USELONGDOUBLE, 0);
 156       for(i=0; i<cnt; i++){
 157         sqlite3_snprintf(sizeof(zBuf), zBuf, "%!.26g", aVal[i%NN]);
 158       }
 159       break;
 160     }
 161
 162   }
 163   return 0;
 164 }