compress_functions.c File Reference

#include "lz4.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdint.h>
#include <inttypes.h>
#include <time.h>
#include <locale.h>

Go to the source code of this file.

Macros
#define	_XOPEN_SOURCE   500
#define	_POSIX_C_SOURCE   199309L
#define	LZ4_DISABLE_DEPRECATE_WARNINGS   /* LZ4_decompress_fast */
#define	BILLION   1000000000L
#define	ID__LZ4_COMPRESS_DEFAULT   1
#define	ID__LZ4_COMPRESS_FAST   2
#define	ID__LZ4_COMPRESS_FAST_EXTSTATE   3
#define	ID__LZ4_COMPRESS_GENERIC   4
#define	ID__LZ4_DECOMPRESS_SAFE   5
#define	ID__LZ4_DECOMPRESS_FAST   6

Functions
void	run_screaming (const char *message, const int code)
void	usage (const char *message)
uint64_t	bench (const char *known_good_dst, const int function_id, const int iterations, const char *src, char *dst, const size_t src_size, const size_t max_dst_size, const size_t comp_size)
int	main (int argc, char **argv)

Macro Definition Documentation

_POSIX_C_SOURCE

#define _POSIX_C_SOURCE   199309L

Definition at line 60 of file compress_functions.c.

_XOPEN_SOURCE

#define _XOPEN_SOURCE   500

Definition at line 58 of file compress_functions.c.

BILLION

#define BILLION   1000000000L

Definition at line 74 of file compress_functions.c.

ID__LZ4_COMPRESS_DEFAULT

#define ID__LZ4_COMPRESS_DEFAULT   1

Definition at line 77 of file compress_functions.c.

ID__LZ4_COMPRESS_FAST

#define ID__LZ4_COMPRESS_FAST   2

Definition at line 78 of file compress_functions.c.

ID__LZ4_COMPRESS_FAST_EXTSTATE

#define ID__LZ4_COMPRESS_FAST_EXTSTATE   3

Definition at line 79 of file compress_functions.c.

ID__LZ4_COMPRESS_GENERIC

#define ID__LZ4_COMPRESS_GENERIC   4

Definition at line 80 of file compress_functions.c.

ID__LZ4_DECOMPRESS_FAST

#define ID__LZ4_DECOMPRESS_FAST   6

Definition at line 82 of file compress_functions.c.

ID__LZ4_DECOMPRESS_SAFE

#define ID__LZ4_DECOMPRESS_SAFE   5

Definition at line 81 of file compress_functions.c.

LZ4_DISABLE_DEPRECATE_WARNINGS

#define LZ4_DISABLE_DEPRECATE_WARNINGS   /* LZ4_decompress_fast */

Definition at line 63 of file compress_functions.c.

Function Documentation

bench()

uint64_t bench	(	const char *	known_good_dst,
		const int	function_id,
		const int	iterations,
		const char *	src,
		char *	dst,
		const size_t	src_size,
		const size_t	max_dst_size,
		const size_t	comp_size
	)

Definition at line 109 of file compress_functions.c.

    {
  uint64_t time_taken = 0;
  int rv = 0;
  const int warm_up = 5000;
  struct timespec start, end;
  const int acceleration = 1;
  LZ4_stream_t state;
 
  // Select the right function to perform the benchmark on.  We perform 5000 initial loops to warm the cache and ensure that dst
  // remains matching to known_good_dst between successive calls.
  switch(function_id) {
    case ID__LZ4_COMPRESS_DEFAULT:
      printf("Starting benchmark for function: LZ4_compress_default()\n");
      for(int junk=0; junk<warm_up; junk++)
        rv = LZ4_compress_default(src, dst, src_size, max_dst_size);
      if (rv < 1)
        run_screaming("Couldn't run LZ4_compress_default()... error code received is in exit code.", rv);
      if (memcmp(known_good_dst, dst, max_dst_size) != 0)
        run_screaming("According to memcmp(), the compressed dst we got doesn't match the known_good_dst... ruh roh.", 1);
      clock_gettime(CLOCK_MONOTONIC, &start);
      for (int i=1; i<=iterations; i++)
        LZ4_compress_default(src, dst, src_size, max_dst_size);
      break;
 
    case ID__LZ4_COMPRESS_FAST:
      printf("Starting benchmark for function: LZ4_compress_fast()\n");
      for(int junk=0; junk<warm_up; junk++)
        rv = LZ4_compress_fast(src, dst, src_size, max_dst_size, acceleration);
      if (rv < 1)
        run_screaming("Couldn't run LZ4_compress_fast()... error code received is in exit code.", rv);
      if (memcmp(known_good_dst, dst, max_dst_size) != 0)
        run_screaming("According to memcmp(), the compressed dst we got doesn't match the known_good_dst... ruh roh.", 1);
      clock_gettime(CLOCK_MONOTONIC, &start);
      for (int i=1; i<=iterations; i++)
        LZ4_compress_fast(src, dst, src_size, max_dst_size, acceleration);
      break;
 
    case ID__LZ4_COMPRESS_FAST_EXTSTATE:
      printf("Starting benchmark for function: LZ4_compress_fast_extState()\n");
      for(int junk=0; junk<warm_up; junk++)
        rv = LZ4_compress_fast_extState(&state, src, dst, src_size, max_dst_size, acceleration);
      if (rv < 1)
        run_screaming("Couldn't run LZ4_compress_fast_extState()... error code received is in exit code.", rv);
      if (memcmp(known_good_dst, dst, max_dst_size) != 0)
        run_screaming("According to memcmp(), the compressed dst we got doesn't match the known_good_dst... ruh roh.", 1);
      clock_gettime(CLOCK_MONOTONIC, &start);
      for (int i=1; i<=iterations; i++)
        LZ4_compress_fast_extState(&state, src, dst, src_size, max_dst_size, acceleration);
      break;
 
//    Disabled until LZ4_compress_generic() is exposed in the header.
//    case ID__LZ4_COMPRESS_GENERIC:
//      printf("Starting benchmark for function: LZ4_compress_generic()\n");
//      LZ4_resetStream((LZ4_stream_t*)&state);
//      for(int junk=0; junk<warm_up; junk++) {
//        LZ4_resetStream((LZ4_stream_t*)&state);
//        //rv = LZ4_compress_generic_wrapper(&state, src, dst, src_size, max_dst_size, notLimited, byU16, noDict, noDictIssue, acceleration);
//        LZ4_compress_generic_wrapper(&state, src, dst, src_size, max_dst_size, acceleration);
//      }
//      if (rv < 1)
//        run_screaming("Couldn't run LZ4_compress_generic()... error code received is in exit code.", rv);
//      if (memcmp(known_good_dst, dst, max_dst_size) != 0)
//        run_screaming("According to memcmp(), the compressed dst we got doesn't match the known_good_dst... ruh roh.", 1);
//      for (int i=1; i<=iterations; i++) {
//        LZ4_resetStream((LZ4_stream_t*)&state);
//        //LZ4_compress_generic_wrapper(&state, src, dst, src_size, max_dst_size, notLimited, byU16, noDict, noDictIssue, acceleration);
//        LZ4_compress_generic_wrapper(&state, src, dst, src_size, max_dst_size, acceleration);
//      }
//      break;
 
    case ID__LZ4_DECOMPRESS_SAFE:
      printf("Starting benchmark for function: LZ4_decompress_safe()\n");
      for(int junk=0; junk<warm_up; junk++)
        rv = LZ4_decompress_safe(src, dst, comp_size, src_size);
      if (rv < 1)
        run_screaming("Couldn't run LZ4_decompress_safe()... error code received is in exit code.", rv);
      if (memcmp(known_good_dst, dst, src_size) != 0)
        run_screaming("According to memcmp(), the compressed dst we got doesn't match the known_good_dst... ruh roh.", 1);
      clock_gettime(CLOCK_MONOTONIC, &start);
      for (int i=1; i<=iterations; i++)
        LZ4_decompress_safe(src, dst, comp_size, src_size);
      break;
 
    case ID__LZ4_DECOMPRESS_FAST:
      printf("Starting benchmark for function: LZ4_decompress_fast()\n");
      for(int junk=0; junk<warm_up; junk++)
        rv = LZ4_decompress_fast(src, dst, src_size);
      if (rv < 1)
        run_screaming("Couldn't run LZ4_decompress_fast()... error code received is in exit code.", rv);
      if (memcmp(known_good_dst, dst, src_size) != 0)
        run_screaming("According to memcmp(), the compressed dst we got doesn't match the known_good_dst... ruh roh.", 1);
      clock_gettime(CLOCK_MONOTONIC, &start);
      for (int i=1; i<=iterations; i++)
        LZ4_decompress_fast(src, dst, src_size);
      break;
 
    default:
      run_screaming("The test specified isn't valid.  Please check your code.", 1);
      break;
  }
 
  // Stop timer and return time taken.
  clock_gettime(CLOCK_MONOTONIC, &end);
  time_taken = BILLION *(end.tv_sec - start.tv_sec) + end.tv_nsec - start.tv_nsec;
 
  return time_taken;
}

References BILLION, dst, test_evm::end, i, ID__LZ4_COMPRESS_DEFAULT, ID__LZ4_COMPRESS_FAST, ID__LZ4_COMPRESS_FAST_EXTSTATE, ID__LZ4_DECOMPRESS_FAST, ID__LZ4_DECOMPRESS_SAFE, LZ4_compress_default(), LZ4_compress_fast(), LZ4_compress_fast_extState(), LZ4_decompress_fast(), LZ4_decompress_safe(), printf(), run_screaming(), src, and start.

Referenced by main().

main()

int main	(	int	argc,
		char **	argv
	)

Definition at line 236 of file compress_functions.c.

                                {
  // Get and verify options.  There's really only 1:  How many iterations to run.
  int iterations = 1000000;
  if (argc > 1)
    iterations = atoi(argv[1]);
  if (iterations < 1)
    usage("Argument 1 (iterations) must be > 0.");
 
  // First we will create 2 sources (char *) of 2000 bytes each.  One normal text, the other highly-compressible text.
  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.";
  const char *hc_src = "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa";
  // Set and derive sizes.  Since we're using strings, use strlen() + 1 for \0.
  const size_t src_size = strlen(src) + 1;
  const size_t max_dst_size = LZ4_compressBound(src_size);
  int bytes_returned = 0;
  // Now build allocations for the data we'll be playing with.
  char *dst               = calloc(1, max_dst_size);
  char *known_good_dst    = calloc(1, max_dst_size);
  char *known_good_hc_dst = calloc(1, max_dst_size);
  if (dst == NULL || known_good_dst == NULL || known_good_hc_dst == NULL)
    run_screaming("Couldn't allocate memory for the destination buffers.  Sad :(", 1);
 
  // Create known-good buffers to verify our tests with other functions will produce the same results.
  bytes_returned = LZ4_compress_default(src, known_good_dst, src_size, max_dst_size);
  if (bytes_returned < 1)
    run_screaming("Couldn't create a known-good destination buffer for comparison... this is bad.", 1);
  const size_t src_comp_size = bytes_returned;
  bytes_returned = LZ4_compress_default(hc_src, known_good_hc_dst, src_size, max_dst_size);
  if (bytes_returned < 1)
    run_screaming("Couldn't create a known-good (highly compressible) destination buffer for comparison... this is bad.", 1);
  const size_t hc_src_comp_size = bytes_returned;
 
 
  /* LZ4_compress_default() */
  // 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.
 
  /* LZ4_compress_fast() */
  // Using this function is identical to LZ4_compress_default except we need to specify an "acceleration" value.  Defaults to 1.
  memset(dst, 0, max_dst_size);
  bytes_returned = LZ4_compress_fast(src, dst, src_size, max_dst_size, 1);
  if (bytes_returned < 1)
    run_screaming("Failed to compress src using LZ4_compress_fast.  echo $? for return code.", bytes_returned);
  if (memcmp(dst, known_good_dst, bytes_returned) != 0)
    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);
 
  /* LZ4_compress_fast_extState() */
  // Using this function directly requires that we build an LZ4_stream_t struct ourselves.  We do NOT have to reset it ourselves.
  memset(dst, 0, max_dst_size);
  LZ4_stream_t state;
  bytes_returned = LZ4_compress_fast_extState(&state, src, dst, src_size, max_dst_size, 1);
  if (bytes_returned < 1)
    run_screaming("Failed to compress src using LZ4_compress_fast_extState.  echo $? for return code.", bytes_returned);
  if (memcmp(dst, known_good_dst, bytes_returned) != 0)
    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);
 
  /* LZ4_compress_generic */
  // When you can exactly control the inputs and options of your LZ4 needs, you can use LZ4_compress_generic and fixed (const)
  // values for the enum types such as dictionary and limitations.  Any other direct-use is probably a bad idea.
  //
  // That said, the LZ4_compress_generic() function is 'static inline' and does not have a prototype in lz4.h to expose a symbol
  // 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
  // do that if they feel it's worth expanding this example.
  //
  // I will, however, leave a skeleton of what would be required to use it directly:
  /*
    memset(dst, 0, max_dst_size);
    // LZ4_stream_t state:  is already declared above.  We can reuse it BUT we have to reset the stream ourselves between each call.
    LZ4_resetStream((LZ4_stream_t *)&state);
    // Since src size is small we know the following enums will be used:  notLimited (0), byU16 (2), noDict (0), noDictIssue (0).
    bytes_returned = LZ4_compress_generic(&state, src, dst, src_size, max_dst_size, notLimited, byU16, noDict, noDictIssue, 1);
    if (bytes_returned < 1)
      run_screaming("Failed to compress src using LZ4_compress_generic.  echo $? for return code.", bytes_returned);
    if (memcmp(dst, known_good_dst, bytes_returned) != 0)
      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);
  */
 
 
  /* Benchmarking */
  /* Now we'll run a few rudimentary benchmarks with each function to demonstrate differences in speed based on the function used.
   * Remember, we cannot call LZ4_compress_generic() directly (yet) so it's disabled.
   */
  // Suite A - Normal Compressibility
  char *dst_d = calloc(1, src_size);
  memset(dst, 0, max_dst_size);
  printf("\nStarting suite A:  Normal compressible text.\n");
  uint64_t time_taken__default       = bench(known_good_dst, ID__LZ4_COMPRESS_DEFAULT,       iterations, src,            dst,   src_size, max_dst_size, src_comp_size);
  uint64_t time_taken__fast          = bench(known_good_dst, ID__LZ4_COMPRESS_FAST,          iterations, src,            dst,   src_size, max_dst_size, src_comp_size);
  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);
  //uint64_t time_taken__generic       = bench(known_good_dst, ID__LZ4_COMPRESS_GENERIC,       iterations, src,            dst,   src_size, max_dst_size, src_comp_size);
  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);
  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);
  // Suite B - Highly Compressible
  memset(dst, 0, max_dst_size);
  printf("\nStarting suite B:  Highly compressible text.\n");
  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);
  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);
  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);
  //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);
  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);
  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);
 
  // Report and leave.
  setlocale(LC_ALL, "");
  const char *format        = "|%-14s|%-30s|%'14.9f|%'16d|%'14d|%'13.2f%%|\n";
  const char *header_format = "|%-14s|%-30s|%14s|%16s|%14s|%14s|\n";
  const char *separator     = "+--------------+------------------------------+--------------+----------------+--------------+--------------+\n";
  printf("\n");
  printf("%s", separator);
  printf(header_format, "Source", "Function Benchmarked", "Total Seconds", "Iterations/sec", "ns/Iteration", "% of default");
  printf("%s", separator);
  printf(format, "Normal Text", "LZ4_compress_default()",       (double)time_taken__default       / BILLION, (int)(iterations / ((double)time_taken__default       /BILLION)), (int)time_taken__default       / iterations, (double)time_taken__default       * 100 / time_taken__default);
  printf(format, "Normal Text", "LZ4_compress_fast()",          (double)time_taken__fast          / BILLION, (int)(iterations / ((double)time_taken__fast          /BILLION)), (int)time_taken__fast          / iterations, (double)time_taken__fast          * 100 / time_taken__default);
  printf(format, "Normal Text", "LZ4_compress_fast_extState()", (double)time_taken__fast_extstate / BILLION, (int)(iterations / ((double)time_taken__fast_extstate /BILLION)), (int)time_taken__fast_extstate / iterations, (double)time_taken__fast_extstate * 100 / time_taken__default);
  //printf(format, "Normal Text", "LZ4_compress_generic()",       (double)time_taken__generic       / BILLION, (int)(iterations / ((double)time_taken__generic       /BILLION)), (int)time_taken__generic       / iterations, (double)time_taken__generic       * 100 / time_taken__default);
  printf(format, "Normal Text", "LZ4_decompress_safe()",        (double)time_taken__decomp_safe   / BILLION, (int)(iterations / ((double)time_taken__decomp_safe   /BILLION)), (int)time_taken__decomp_safe   / iterations, (double)time_taken__decomp_safe   * 100 / time_taken__default);
  printf(format, "Normal Text", "LZ4_decompress_fast()",        (double)time_taken__decomp_fast   / BILLION, (int)(iterations / ((double)time_taken__decomp_fast   /BILLION)), (int)time_taken__decomp_fast   / iterations, (double)time_taken__decomp_fast   * 100 / time_taken__default);
  printf(header_format, "", "", "", "", "", "");
  printf(format, "Compressible", "LZ4_compress_default()",       (double)time_taken_hc__default       / BILLION, (int)(iterations / ((double)time_taken_hc__default       /BILLION)), (int)time_taken_hc__default       / iterations, (double)time_taken_hc__default       * 100 / time_taken_hc__default);
  printf(format, "Compressible", "LZ4_compress_fast()",          (double)time_taken_hc__fast          / BILLION, (int)(iterations / ((double)time_taken_hc__fast          /BILLION)), (int)time_taken_hc__fast          / iterations, (double)time_taken_hc__fast          * 100 / time_taken_hc__default);
  printf(format, "Compressible", "LZ4_compress_fast_extState()", (double)time_taken_hc__fast_extstate / BILLION, (int)(iterations / ((double)time_taken_hc__fast_extstate /BILLION)), (int)time_taken_hc__fast_extstate / iterations, (double)time_taken_hc__fast_extstate * 100 / time_taken_hc__default);
  //printf(format, "Compressible", "LZ4_compress_generic()",       (double)time_taken_hc__generic       / BILLION, (int)(iterations / ((double)time_taken_hc__generic       /BILLION)), (int)time_taken_hc__generic       / iterations, (double)time_taken_hc__generic       * 100 / time_taken_hc__default);
  printf(format, "Compressible", "LZ4_decompress_safe()",        (double)time_taken_hc__decomp_safe   / BILLION, (int)(iterations / ((double)time_taken_hc__decomp_safe   /BILLION)), (int)time_taken_hc__decomp_safe   / iterations, (double)time_taken_hc__decomp_safe   * 100 / time_taken_hc__default);
  printf(format, "Compressible", "LZ4_decompress_fast()",        (double)time_taken_hc__decomp_fast   / BILLION, (int)(iterations / ((double)time_taken_hc__decomp_fast   /BILLION)), (int)time_taken_hc__decomp_fast   / iterations, (double)time_taken_hc__decomp_fast   * 100 / time_taken_hc__default);
  printf("%s", separator);
  printf("\n");
  printf("All done, ran %d iterations per test.\n", iterations);
  return 0;
}

References argv, bench(), BILLION, calloc(), dst, ID__LZ4_COMPRESS_DEFAULT, ID__LZ4_COMPRESS_FAST, ID__LZ4_COMPRESS_FAST_EXTSTATE, ID__LZ4_DECOMPRESS_FAST, ID__LZ4_DECOMPRESS_SAFE, LZ4_compress_default(), LZ4_compress_fast(), LZ4_compress_fast_extState(), LZ4_compressBound(), memset(), NULL, printf(), run_screaming(), src, and usage().

run_screaming()

void run_screaming	(	const char *	message,
		const int	code
	)

Definition at line 89 of file compress_functions.c.

                                                        {
  printf("%s\n", message);
  exit(code);
}

References test-lz4-list::exit, message, and printf().

Referenced by bench(), main(), and usage().

usage()

void usage

(

const char *

message

)

Definition at line 98 of file compress_functions.c.

                                {
  printf("Usage: ./argPerformanceTesting <iterations>\n");
  run_screaming(message, 1);
  return;
}

References message, printf(), and run_screaming().

Referenced by lzma_raw_coder_memusage(), main(), print_help(), and uv_getrusage().