130 lines
3.9 KiB
C++
130 lines
3.9 KiB
C++
/*
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*******************************************************************************
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*
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* Copyright (C) 2009, International Business Machines
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* Corporation and others. All Rights Reserved.
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*
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*******************************************************************************
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* file name: ucnvavailperf.cpp
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* encoding: US-ASCII
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* tab size: 8 (not used)
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* indentation:4
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*
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* created on: 2009apr06
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* created by: Markus W. Scherer
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*
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* Test performance (time & memory) of ucnv_countAvailable(),
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* for a before-and-after comparison of
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* ticket 6441: make ucnv_countAvailable() not fully load converters
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*
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* Run with one optional command-line argument:
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* You can specify the path to the ICU data directory.
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*
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* I built the common (icuuc) library with the following modification,
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* switching between old (pre-ticket-6441) behavior of actually
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* trying to load all converters and new behavior of just doing enough
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* to test availability.
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*
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* Code in the ucnv_bld.c haveAvailableConverterList() function:
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#if 0
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// old pre-ticket-6441 behavior
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ucnv_close(ucnv_createConverter(&tempConverter, converterName, &localStatus));
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if (U_SUCCESS(localStatus)) {
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#else
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// new behavior
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if (ucnv_canCreateConverter(converterName, &localStatus)) {
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#endif
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*/
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#include <malloc.h>
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#include <stdio.h>
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#include "unicode/utypes.h"
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#include "unicode/putil.h"
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#include "unicode/uclean.h"
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#include "unicode/ucnv.h"
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#include "unicode/utimer.h"
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static size_t icuMemUsage = 0;
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U_CDECL_BEGIN
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void *U_CALLCONV
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my_alloc(const void *context, size_t size) {
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size_t *p = (size_t *)malloc(size + sizeof(size_t));
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if (p != NULL) {
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icuMemUsage += size;
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*p = size;
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return p + 1;
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} else {
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return NULL;
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}
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}
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void U_CALLCONV
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my_free(const void *context, void *mem) {
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if (mem != NULL) {
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const size_t *p = (const size_t *)mem - 1;
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icuMemUsage -= *p;
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free((void *)p);
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}
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}
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// Not used in the common library.
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void *U_CALLCONV
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my_realloc(const void *context, void *mem, size_t size) {
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my_free(context, mem);
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return NULL;
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}
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U_CDECL_END
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int main(int argc, const char *argv[]) {
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UErrorCode errorCode = U_ZERO_ERROR;
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// Hook in our own memory allocation functions so that we can measure
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// the memory usage.
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u_setMemoryFunctions(NULL, my_alloc, my_realloc, my_free, &errorCode);
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if(U_FAILURE(errorCode)) {
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fprintf(stderr,
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"u_setMemoryFunctions() failed - %s\n",
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u_errorName(errorCode));
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return errorCode;
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}
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if (argc > 1) {
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printf("u_setDataDirectory(%s)\n", argv[1]);
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u_setDataDirectory(argv[1]);
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}
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// Preload a purely algorithmic converter via an alias,
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// to make sure that relevant data can be loaded and to set up
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// caches and such that are needed even if none of the data-driven
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// converters needs to be loaded.
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ucnv_close(ucnv_open("ibm-1208", &errorCode));
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if(U_FAILURE(errorCode)) {
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fprintf(stderr,
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"unable to open UTF-8 converter via an alias - %s\n",
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u_errorName(errorCode));
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return errorCode;
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}
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printf("memory usage after ucnv_open(ibm-1208): %lu\n", (long)icuMemUsage);
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UTimer start_time;
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utimer_getTime(&start_time);
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// Measure the time to find out the list of actually available converters.
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int32_t count = ucnv_countAvailable();
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double elapsed = utimer_getElapsedSeconds(&start_time);
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printf("ucnv_countAvailable() reports that %d converters are available.\n", count);
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printf("ucnv_countAvailable() took %g seconds to figure this out.\n", elapsed);
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printf("memory usage after ucnv_countAvailable(): %lu\n", (long)icuMemUsage);
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ucnv_flushCache();
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printf("memory usage after ucnv_flushCache(): %lu\n", (long)icuMemUsage);
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u_cleanup();
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printf("memory usage after u_cleanup(): %lu\n", (long)icuMemUsage);
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return 0;
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}
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