1 /* 2 * compress_functions.c 3 * Copyright : Kyle Harper 4 * License : Follows same licensing as the lz4.c/lz4.h program at any given time. Currently, BSD 2. 5 * Description: A program to demonstrate the various compression functions involved in when using LZ4_compress_default(). The idea 6 * is to show how each step in the call stack can be used directly, if desired. There is also some benchmarking for 7 * each function to demonstrate the (probably lack of) performance difference when jumping the stack. 8 * (If you're new to lz4, please read simple_buffer.c to understand the fundamentals) 9 * 10 * The call stack (before theoretical compiler optimizations) for LZ4_compress_default is as follows: 11 * LZ4_compress_default 12 * LZ4_compress_fast 13 * LZ4_compress_fast_extState 14 * LZ4_compress_generic 15 * 16 * LZ4_compress_default() 17 * This is the recommended function for compressing data. It will serve as the baseline for comparison. 18 * LZ4_compress_fast() 19 * Despite its name, it's not a "fast" version of compression. It simply decides if HEAPMODE is set and either 20 * allocates memory on the heap for a struct or creates the struct directly on the stack. Stack access is generally 21 * faster but this function itself isn't giving that advantage, it's just some logic for compile time. 22 * LZ4_compress_fast_extState() 23 * This simply accepts all the pointers and values collected thus far and adds logic to determine how 24 * LZ4_compress_generic should be invoked; specifically: can the source fit into a single pass as determined by 25 * LZ4_64Klimit. 26 * LZ4_compress_generic() 27 * As the name suggests, this is the generic function that ultimately does most of the heavy lifting. Calling this 28 * directly can help avoid some test cases and branching which might be useful in some implementation-specific 29 * situations, but you really need to know what you're doing AND what you're asking lz4 to do! You also need a 30 * wrapper function because this function isn't exposed with lz4.h. 31 * 32 * The call stack for decompression functions is shallow. There are 2 options: 33 * LZ4_decompress_safe || LZ4_decompress_fast 34 * LZ4_decompress_generic 35 * 36 * LZ4_decompress_safe 37 * This is the recommended function for decompressing data. It is considered safe because the caller specifies 38 * both the size of the compresssed buffer to read as well as the maximum size of the output (decompressed) buffer 39 * instead of just the latter. 40 * LZ4_decompress_fast 41 * Again, despite its name it's not a "fast" version of decompression. It simply frees the caller of sending the 42 * size of the compressed buffer (it will simply be read-to-end, hence it's non-safety). 43 * LZ4_decompress_generic 44 * This is the generic function that both of the LZ4_decompress_* functions above end up calling. Calling this 45 * directly is not advised, period. Furthermore, it is a static inline function in lz4.c, so there isn't a symbol 46 * exposed for anyone using lz4.h to utilize. 47 * 48 * Special Note About Decompression: 49 * Using the LZ4_decompress_safe() function protects against malicious (user) input. If you are using data from a 50 * trusted source, or if your program is the producer (P) as well as its consumer (C) in a PC or MPMC setup, you can 51 * safely use the LZ4_decompress_fast function 52 */ 53 54 /* Since lz4 compiles with c99 and not gnu/std99 we need to enable POSIX linking for time.h structs and functions. */ 55 #if __STDC_VERSION__ >= 199901L 56 #define _XOPEN_SOURCE 600 57 #else 58 #define _XOPEN_SOURCE 500 59 #endif 60 #define _POSIX_C_SOURCE 199309L 61 62 /* Includes, for Power! */ 63 #include "lz4.h" 64 #include <stdio.h> /* for printf() */ 65 #include <stdlib.h> /* for exit() */ 66 #include <string.h> /* for atoi() memcmp() */ 67 #include <stdint.h> /* for uint_types */ 68 #include <inttypes.h> /* for PRIu64 */ 69 #include <time.h> /* for clock_gettime() */ 70 #include <locale.h> /* for setlocale() */ 71 72 /* We need to know what one billion is for clock timing. */ 73 #define BILLION 1000000000L 74 75 /* Create a crude set of test IDs so we can switch on them later (Can't switch() on a char[] or char*). */ 76 #define ID__LZ4_COMPRESS_DEFAULT 1 77 #define ID__LZ4_COMPRESS_FAST 2 78 #define ID__LZ4_COMPRESS_FAST_EXTSTATE 3 79 #define ID__LZ4_COMPRESS_GENERIC 4 80 #define ID__LZ4_DECOMPRESS_SAFE 5 81 #define ID__LZ4_DECOMPRESS_FAST 6 82 83 84 85 /* 86 * Easy show-error-and-bail function. 87 */ 88 void run_screaming(const char *message, const int code) { 89 printf("%s\n", message); 90 exit(code); 91 return; 92 } 93 94 95 /* 96 * Centralize the usage function to keep main cleaner. 97 */ 98 void usage(const char *message) { 99 printf("Usage: ./argPerformanceTesting <iterations>\n"); 100 run_screaming(message, 1); 101 return; 102 } 103 104 105 106 /* 107 * Runs the benchmark for LZ4_compress_* based on function_id. 108 */ 109 uint64_t bench( 110 const char *known_good_dst, 111 const int function_id, 112 const int iterations, 113 const char *src, 114 char *dst, 115 const size_t src_size, 116 const size_t max_dst_size, 117 const size_t comp_size 118 ) { 119 uint64_t time_taken = 0; 120 int rv = 0; 121 const int warm_up = 5000; 122 struct timespec start, end; 123 const int acceleration = 1; 124 LZ4_stream_t state; 125 126 // Select the right function to perform the benchmark on. We perform 5000 initial loops to warm the cache and ensure that dst 127 // remains matching to known_good_dst between successive calls. 128 switch(function_id) { 129 case ID__LZ4_COMPRESS_DEFAULT: 130 printf("Starting benchmark for function: LZ4_compress_default()\n"); 131 for(int junk=0; junk<warm_up; junk++) 132 rv = LZ4_compress_default(src, dst, src_size, max_dst_size); 133 if (rv < 1) 134 run_screaming("Couldn't run LZ4_compress_default()... error code received is in exit code.", rv); 135 if (memcmp(known_good_dst, dst, max_dst_size) != 0) 136 run_screaming("According to memcmp(), the compressed dst we got doesn't match the known_good_dst... ruh roh.", 1); 137 clock_gettime(CLOCK_MONOTONIC, &start); 138 for (int i=1; i<=iterations; i++) 139 LZ4_compress_default(src, dst, src_size, max_dst_size); 140 break; 141 142 case ID__LZ4_COMPRESS_FAST: 143 printf("Starting benchmark for function: LZ4_compress_fast()\n"); 144 for(int junk=0; junk<warm_up; junk++) 145 rv = LZ4_compress_fast(src, dst, src_size, max_dst_size, acceleration); 146 if (rv < 1) 147 run_screaming("Couldn't run LZ4_compress_fast()... error code received is in exit code.", rv); 148 if (memcmp(known_good_dst, dst, max_dst_size) != 0) 149 run_screaming("According to memcmp(), the compressed dst we got doesn't match the known_good_dst... ruh roh.", 1); 150 clock_gettime(CLOCK_MONOTONIC, &start); 151 for (int i=1; i<=iterations; i++) 152 LZ4_compress_fast(src, dst, src_size, max_dst_size, acceleration); 153 break; 154 155 case ID__LZ4_COMPRESS_FAST_EXTSTATE: 156 printf("Starting benchmark for function: LZ4_compress_fast_extState()\n"); 157 for(int junk=0; junk<warm_up; junk++) 158 rv = LZ4_compress_fast_extState(&state, src, dst, src_size, max_dst_size, acceleration); 159 if (rv < 1) 160 run_screaming("Couldn't run LZ4_compress_fast_extState()... error code received is in exit code.", rv); 161 if (memcmp(known_good_dst, dst, max_dst_size) != 0) 162 run_screaming("According to memcmp(), the compressed dst we got doesn't match the known_good_dst... ruh roh.", 1); 163 clock_gettime(CLOCK_MONOTONIC, &start); 164 for (int i=1; i<=iterations; i++) 165 LZ4_compress_fast_extState(&state, src, dst, src_size, max_dst_size, acceleration); 166 break; 167 168 // Disabled until LZ4_compress_generic() is exposed in the header. 169 // case ID__LZ4_COMPRESS_GENERIC: 170 // printf("Starting benchmark for function: LZ4_compress_generic()\n"); 171 // LZ4_resetStream((LZ4_stream_t*)&state); 172 // for(int junk=0; junk<warm_up; junk++) { 173 // LZ4_resetStream((LZ4_stream_t*)&state); 174 // //rv = LZ4_compress_generic_wrapper(&state, src, dst, src_size, max_dst_size, notLimited, byU16, noDict, noDictIssue, acceleration); 175 // LZ4_compress_generic_wrapper(&state, src, dst, src_size, max_dst_size, acceleration); 176 // } 177 // if (rv < 1) 178 // run_screaming("Couldn't run LZ4_compress_generic()... error code received is in exit code.", rv); 179 // if (memcmp(known_good_dst, dst, max_dst_size) != 0) 180 // run_screaming("According to memcmp(), the compressed dst we got doesn't match the known_good_dst... ruh roh.", 1); 181 // for (int i=1; i<=iterations; i++) { 182 // LZ4_resetStream((LZ4_stream_t*)&state); 183 // //LZ4_compress_generic_wrapper(&state, src, dst, src_size, max_dst_size, notLimited, byU16, noDict, noDictIssue, acceleration); 184 // LZ4_compress_generic_wrapper(&state, src, dst, src_size, max_dst_size, acceleration); 185 // } 186 // break; 187 188 case ID__LZ4_DECOMPRESS_SAFE: 189 printf("Starting benchmark for function: LZ4_decompress_safe()\n"); 190 for(int junk=0; junk<warm_up; junk++) 191 rv = LZ4_decompress_safe(src, dst, comp_size, src_size); 192 if (rv < 1) 193 run_screaming("Couldn't run LZ4_decompress_safe()... error code received is in exit code.", rv); 194 if (memcmp(known_good_dst, dst, src_size) != 0) 195 run_screaming("According to memcmp(), the compressed dst we got doesn't match the known_good_dst... ruh roh.", 1); 196 clock_gettime(CLOCK_MONOTONIC, &start); 197 for (int i=1; i<=iterations; i++) 198 LZ4_decompress_safe(src, dst, comp_size, src_size); 199 break; 200 201 case ID__LZ4_DECOMPRESS_FAST: 202 printf("Starting benchmark for function: LZ4_decompress_fast()\n"); 203 for(int junk=0; junk<warm_up; junk++) 204 rv = LZ4_decompress_fast(src, dst, src_size); 205 if (rv < 1) 206 run_screaming("Couldn't run LZ4_decompress_fast()... error code received is in exit code.", rv); 207 if (memcmp(known_good_dst, dst, src_size) != 0) 208 run_screaming("According to memcmp(), the compressed dst we got doesn't match the known_good_dst... ruh roh.", 1); 209 clock_gettime(CLOCK_MONOTONIC, &start); 210 for (int i=1; i<=iterations; i++) 211 LZ4_decompress_fast(src, dst, src_size); 212 break; 213 214 default: 215 run_screaming("The test specified isn't valid. Please check your code.", 1); 216 break; 217 } 218 219 // Stop timer and return time taken. 220 clock_gettime(CLOCK_MONOTONIC, &end); 221 time_taken = BILLION *(end.tv_sec - start.tv_sec) + end.tv_nsec - start.tv_nsec; 222 223 return time_taken; 224 } 225 226 227 228 /* 229 * main() 230 * We will demonstrate the use of each function for simplicity sake. Then we will run 2 suites of benchmarking: 231 * Test suite A) Uses generic Lorem Ipsum text which should be generally compressible insomuch as basic human text is 232 * compressible for such a small src_size 233 * Test Suite B) For the sake of testing, see what results we get if the data is drastically easier to compress. IF there are 234 * indeed losses and IF more compressible data is faster to process, this will exacerbate the findings. 235 */ 236 int main(int argc, char **argv) { 237 // Get and verify options. There's really only 1: How many iterations to run. 238 int iterations = 1000000; 239 if (argc > 1) 240 iterations = atoi(argv[1]); 241 if (iterations < 1) 242 usage("Argument 1 (iterations) must be > 0."); 243 244 // First we will create 2 sources (char *) of 2000 bytes each. One normal text, the other highly-compressible text. 245 const char *src = "Lorem ipsum dolor sit amet, consectetur adipiscing elit. Sed luctus purus et risus vulputate, et mollis orci ullamcorper. Nulla facilisi. Fusce in ligula sed purus varius aliquet interdum vitae justo. Proin quis diam velit. Nulla varius iaculis auctor. Cras volutpat, justo eu dictum pulvinar, elit sem porttitor metus, et imperdiet metus sapien et ante. Nullam nisi nulla, ornare eu tristique eu, dignissim vitae diam. Nulla sagittis porta libero, a accumsan felis sagittis scelerisque. Integer laoreet eleifend congue. Etiam rhoncus leo vel dolor fermentum, quis luctus nisl iaculis. Praesent a erat sapien. Aliquam semper mi in lorem ultrices ultricies. Lorem ipsum dolor sit amet, consectetur adipiscing elit. In feugiat risus sed enim ultrices, at sodales nulla tristique. Maecenas eget pellentesque justo, sed pellentesque lectus. Fusce sagittis sit amet elit vel varius. Donec sed ligula nec ligula vulputate rutrum sed ut lectus. Etiam congue pharetra leo vitae cursus. Morbi enim ante, porttitor ut varius vel, tincidunt quis justo. Nunc iaculis, risus id ultrices semper, metus est efficitur ligula, vel posuere risus nunc eget purus. Ut lorem turpis, condimentum at sem sed, porta aliquam turpis. In ut sapien a nulla dictum tincidunt quis sit amet lorem. Fusce at est egestas, luctus neque eu, consectetur tortor. Phasellus eleifend ultricies nulla ac lobortis. Morbi maximus quam cursus vehicula iaculis. Maecenas cursus vel justo ut rutrum. Curabitur magna orci, dignissim eget dapibus vitae, finibus id lacus. Praesent rhoncus mattis augue vitae bibendum. Praesent porta mauris non ultrices fermentum. Quisque vulputate ipsum in sodales pulvinar. Aliquam nec mollis felis. Donec vitae augue pulvinar, congue nisl sed, pretium purus. Fusce lobortis mi ac neque scelerisque semper. Pellentesque vel est vitae magna aliquet aliquet. Nam non dolor. Nulla facilisi. Class aptent taciti sociosqu ad litora torquent per conubia nostra, per inceptos himenaeos. Morbi ac lacinia felis metus."; 246 const char *hc_src = "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"; 247 // Set and derive sizes. Since we're using strings, use strlen() + 1 for \0. 248 const size_t src_size = strlen(src) + 1; 249 const size_t max_dst_size = LZ4_compressBound(src_size); 250 int bytes_returned = 0; 251 // Now build allocations for the data we'll be playing with. 252 char *dst = calloc(1, max_dst_size); 253 char *known_good_dst = calloc(1, max_dst_size); 254 char *known_good_hc_dst = calloc(1, max_dst_size); 255 if (dst == NULL || known_good_dst == NULL || known_good_hc_dst == NULL) 256 run_screaming("Couldn't allocate memory for the destination buffers. Sad :(", 1); 257 258 // Create known-good buffers to verify our tests with other functions will produce the same results. 259 bytes_returned = LZ4_compress_default(src, known_good_dst, src_size, max_dst_size); 260 if (bytes_returned < 1) 261 run_screaming("Couldn't create a known-good destination buffer for comparison... this is bad.", 1); 262 const size_t src_comp_size = bytes_returned; 263 bytes_returned = LZ4_compress_default(hc_src, known_good_hc_dst, src_size, max_dst_size); 264 if (bytes_returned < 1) 265 run_screaming("Couldn't create a known-good (highly compressible) destination buffer for comparison... this is bad.", 1); 266 const size_t hc_src_comp_size = bytes_returned; 267 268 269 /* LZ4_compress_default() */ 270 // This is the default function so we don't need to demonstrate how to use it. See basics.c if you need more basal information. 271 272 /* LZ4_compress_fast() */ 273 // Using this function is identical to LZ4_compress_default except we need to specify an "acceleration" value. Defaults to 1. 274 memset(dst, 0, max_dst_size); 275 bytes_returned = LZ4_compress_fast(src, dst, src_size, max_dst_size, 1); 276 if (bytes_returned < 1) 277 run_screaming("Failed to compress src using LZ4_compress_fast. echo $? for return code.", bytes_returned); 278 if (memcmp(dst, known_good_dst, bytes_returned) != 0) 279 run_screaming("According to memcmp(), the value we got in dst from LZ4_compress_fast doesn't match the known-good value. This is bad.", 1); 280 281 /* LZ4_compress_fast_extState() */ 282 // Using this function directly requires that we build an LZ4_stream_t struct ourselves. We do NOT have to reset it ourselves. 283 memset(dst, 0, max_dst_size); 284 LZ4_stream_t state; 285 bytes_returned = LZ4_compress_fast_extState(&state, src, dst, src_size, max_dst_size, 1); 286 if (bytes_returned < 1) 287 run_screaming("Failed to compress src using LZ4_compress_fast_extState. echo $? for return code.", bytes_returned); 288 if (memcmp(dst, known_good_dst, bytes_returned) != 0) 289 run_screaming("According to memcmp(), the value we got in dst from LZ4_compress_fast_extState doesn't match the known-good value. This is bad.", 1); 290 291 /* LZ4_compress_generic */ 292 // When you can exactly control the inputs and options of your LZ4 needs, you can use LZ4_compress_generic and fixed (const) 293 // values for the enum types such as dictionary and limitations. Any other direct-use is probably a bad idea. 294 // 295 // That said, the LZ4_compress_generic() function is 'static inline' and does not have a prototype in lz4.h to expose a symbol 296 // for it. In other words: we can't access it directly. I don't want to submit a PR that modifies lz4.c/h. Yann and others can 297 // do that if they feel it's worth expanding this example. 298 // 299 // I will, however, leave a skeleton of what would be required to use it directly: 300 /* 301 memset(dst, 0, max_dst_size); 302 // LZ4_stream_t state: is already declared above. We can reuse it BUT we have to reset the stream ourselves between each call. 303 LZ4_resetStream((LZ4_stream_t *)&state); 304 // Since src size is small we know the following enums will be used: notLimited (0), byU16 (2), noDict (0), noDictIssue (0). 305 bytes_returned = LZ4_compress_generic(&state, src, dst, src_size, max_dst_size, notLimited, byU16, noDict, noDictIssue, 1); 306 if (bytes_returned < 1) 307 run_screaming("Failed to compress src using LZ4_compress_generic. echo $? for return code.", bytes_returned); 308 if (memcmp(dst, known_good_dst, bytes_returned) != 0) 309 run_screaming("According to memcmp(), the value we got in dst from LZ4_compress_generic doesn't match the known-good value. This is bad.", 1); 310 */ 311 312 313 /* Benchmarking */ 314 /* Now we'll run a few rudimentary benchmarks with each function to demonstrate differences in speed based on the function used. 315 * Remember, we cannot call LZ4_compress_generic() directly (yet) so it's disabled. 316 */ 317 // Suite A - Normal Compressibility 318 char *dst_d = calloc(1, src_size); 319 memset(dst, 0, max_dst_size); 320 printf("\nStarting suite A: Normal compressible text.\n"); 321 uint64_t time_taken__default = bench(known_good_dst, ID__LZ4_COMPRESS_DEFAULT, iterations, src, dst, src_size, max_dst_size, src_comp_size); 322 uint64_t time_taken__fast = bench(known_good_dst, ID__LZ4_COMPRESS_FAST, iterations, src, dst, src_size, max_dst_size, src_comp_size); 323 uint64_t time_taken__fast_extstate = bench(known_good_dst, ID__LZ4_COMPRESS_FAST_EXTSTATE, iterations, src, dst, src_size, max_dst_size, src_comp_size); 324 //uint64_t time_taken__generic = bench(known_good_dst, ID__LZ4_COMPRESS_GENERIC, iterations, src, dst, src_size, max_dst_size, src_comp_size); 325 uint64_t time_taken__decomp_safe = bench(src, ID__LZ4_DECOMPRESS_SAFE, iterations, known_good_dst, dst_d, src_size, max_dst_size, src_comp_size); 326 uint64_t time_taken__decomp_fast = bench(src, ID__LZ4_DECOMPRESS_FAST, iterations, known_good_dst, dst_d, src_size, max_dst_size, src_comp_size); 327 // Suite B - Highly Compressible 328 memset(dst, 0, max_dst_size); 329 printf("\nStarting suite B: Highly compressible text.\n"); 330 uint64_t time_taken_hc__default = bench(known_good_hc_dst, ID__LZ4_COMPRESS_DEFAULT, iterations, hc_src, dst, src_size, max_dst_size, hc_src_comp_size); 331 uint64_t time_taken_hc__fast = bench(known_good_hc_dst, ID__LZ4_COMPRESS_FAST, iterations, hc_src, dst, src_size, max_dst_size, hc_src_comp_size); 332 uint64_t time_taken_hc__fast_extstate = bench(known_good_hc_dst, ID__LZ4_COMPRESS_FAST_EXTSTATE, iterations, hc_src, dst, src_size, max_dst_size, hc_src_comp_size); 333 //uint64_t time_taken_hc__generic = bench(known_good_hc_dst, ID__LZ4_COMPRESS_GENERIC, iterations, hc_src, dst, src_size, max_dst_size, hc_src_comp_size); 334 uint64_t time_taken_hc__decomp_safe = bench(hc_src, ID__LZ4_DECOMPRESS_SAFE, iterations, known_good_hc_dst, dst_d, src_size, max_dst_size, hc_src_comp_size); 335 uint64_t time_taken_hc__decomp_fast = bench(hc_src, ID__LZ4_DECOMPRESS_FAST, iterations, known_good_hc_dst, dst_d, src_size, max_dst_size, hc_src_comp_size); 336 337 // Report and leave. 338 setlocale(LC_ALL, ""); 339 const char *format = "|%-14s|%-30s|%'14.9f|%'16d|%'14d|%'13.2f%%|\n"; 340 const char *header_format = "|%-14s|%-30s|%14s|%16s|%14s|%14s|\n"; 341 const char *separator = "+--------------+------------------------------+--------------+----------------+--------------+--------------+\n"; 342 printf("\n"); 343 printf("%s", separator); 344 printf(header_format, "Source", "Function Benchmarked", "Total Seconds", "Iterations/sec", "ns/Iteration", "% of default"); 345 printf("%s", separator); 346 printf(format, "Normal Text", "LZ4_compress_default()", (double)time_taken__default / BILLION, (int)(iterations / ((double)time_taken__default /BILLION)), time_taken__default / iterations, (double)time_taken__default * 100 / time_taken__default); 347 printf(format, "Normal Text", "LZ4_compress_fast()", (double)time_taken__fast / BILLION, (int)(iterations / ((double)time_taken__fast /BILLION)), time_taken__fast / iterations, (double)time_taken__fast * 100 / time_taken__default); 348 printf(format, "Normal Text", "LZ4_compress_fast_extState()", (double)time_taken__fast_extstate / BILLION, (int)(iterations / ((double)time_taken__fast_extstate /BILLION)), time_taken__fast_extstate / iterations, (double)time_taken__fast_extstate * 100 / time_taken__default); 349 //printf(format, "Normal Text", "LZ4_compress_generic()", (double)time_taken__generic / BILLION, (int)(iterations / ((double)time_taken__generic /BILLION)), time_taken__generic / iterations, (double)time_taken__generic * 100 / time_taken__default); 350 printf(format, "Normal Text", "LZ4_decompress_safe()", (double)time_taken__decomp_safe / BILLION, (int)(iterations / ((double)time_taken__decomp_safe /BILLION)), time_taken__decomp_safe / iterations, (double)time_taken__decomp_safe * 100 / time_taken__default); 351 printf(format, "Normal Text", "LZ4_decompress_fast()", (double)time_taken__decomp_fast / BILLION, (int)(iterations / ((double)time_taken__decomp_fast /BILLION)), time_taken__decomp_fast / iterations, (double)time_taken__decomp_fast * 100 / time_taken__default); 352 printf(header_format, "", "", "", "", "", ""); 353 printf(format, "Compressible", "LZ4_compress_default()", (double)time_taken_hc__default / BILLION, (int)(iterations / ((double)time_taken_hc__default /BILLION)), time_taken_hc__default / iterations, (double)time_taken_hc__default * 100 / time_taken_hc__default); 354 printf(format, "Compressible", "LZ4_compress_fast()", (double)time_taken_hc__fast / BILLION, (int)(iterations / ((double)time_taken_hc__fast /BILLION)), time_taken_hc__fast / iterations, (double)time_taken_hc__fast * 100 / time_taken_hc__default); 355 printf(format, "Compressible", "LZ4_compress_fast_extState()", (double)time_taken_hc__fast_extstate / BILLION, (int)(iterations / ((double)time_taken_hc__fast_extstate /BILLION)), time_taken_hc__fast_extstate / iterations, (double)time_taken_hc__fast_extstate * 100 / time_taken_hc__default); 356 //printf(format, "Compressible", "LZ4_compress_generic()", (double)time_taken_hc__generic / BILLION, (int)(iterations / ((double)time_taken_hc__generic /BILLION)), time_taken_hc__generic / iterations, (double)time_taken_hc__generic * 100 / time_taken_hc__default); 357 printf(format, "Compressible", "LZ4_decompress_safe()", (double)time_taken_hc__decomp_safe / BILLION, (int)(iterations / ((double)time_taken_hc__decomp_safe /BILLION)), time_taken_hc__decomp_safe / iterations, (double)time_taken_hc__decomp_safe * 100 / time_taken_hc__default); 358 printf(format, "Compressible", "LZ4_decompress_fast()", (double)time_taken_hc__decomp_fast / BILLION, (int)(iterations / ((double)time_taken_hc__decomp_fast /BILLION)), time_taken_hc__decomp_fast / iterations, (double)time_taken_hc__decomp_fast * 100 / time_taken_hc__default); 359 printf("%s", separator); 360 printf("\n"); 361 printf("All done, ran %d iterations per test.\n", iterations); 362 return 0; 363 } 364
