Overhaul time support API

This patch changes the duration_* API in several ways.  First, it
updates the API to use better names.  Second, string formatting has
been removed from the API (with its associated malloc).  Finally, a
new function added to convert the time into seconds, which can be
used (or formatted) by the caller.  This eliminates hidden calls to
malloc that require associated calls to free().

This patch also removes the useless extern keyword from prototypes,
and it eliminates the duration_t typedef (use 'struct duration').
These API also allows proper error checking, as it is possible for
gettimeofday to fail in certain circumstances.

The consumers have all been chased to use this new API as well, as
there were relatively few cases doing this type of measurement.
In most cases, the code performs additional checks for errors, but
the calling code looks much cleaner in every case.

6 files changed, 153 insertions, 215 deletions

diff --git a/src/flash/flash.c b/src/flash/flash.c
index 329ade63..22c6069e 100644
--- a/src/flash/flash.c
+++ b/src/flash/flash.c
@@ -503,8 +503,6 @@ static int handle_flash_erase_address_command(struct command_context_s *cmd_ctx,
 	int retval;
 	int address;
 	int length;
-	duration_t duration;
-	char *duration_text;
 
 	target_t *target = get_current_target(cmd_ctx);
 
@@ -528,16 +526,16 @@ static int handle_flash_erase_address_command(struct command_context_s *cmd_ctx,
 	/* We can't know if we did a resume + halt, in which case we no longer know the erased state */
 	flash_set_dirty();
 
-	duration_start_measure(&duration);
+	struct duration bench;
+	duration_start(&bench);
 
-	if ((retval = flash_erase_address_range(target, address, length)) == ERROR_OK)
+	retval = flash_erase_address_range(target, address, length);
+
+	if ((ERROR_OK == retval) && (duration_measure(&bench) == ERROR_OK))
 	{
-		if ((retval = duration_stop_measure(&duration, &duration_text)) != ERROR_OK)
-		{
-			return retval;
-		}
-		command_print(cmd_ctx, "erased address 0x%8.8x length %i in %s", address, length, duration_text);
-		free(duration_text);
+		command_print(cmd_ctx, "erased address 0x%8.8x (length %i)"
+				" in %fs (%0.3f kb/s)", address, length,
+				duration_elapsed(&bench), duration_kbps(&bench, length));
 	}
 
 	return retval;
@@ -613,19 +611,16 @@ static int handle_flash_erase_command(struct command_context_s *cmd_ctx,
 			first, last, p->num_sectors)) != ERROR_OK)
 		return retval;
 
-	duration_t duration;
-	char *duration_text;
-	duration_start_measure(&duration);
+	struct duration bench;
+	duration_start(&bench);
 
-	if ((retval = flash_driver_erase(p, first, last)) == ERROR_OK) {
-		if ((retval = duration_stop_measure(&duration,
-					&duration_text)) != ERROR_OK)
-			return retval;
-		command_print(cmd_ctx, "erased sectors %i through %i "
-				"on flash bank %i in %s",
-			(int) first, (int) last, (int) bank_nr,
-			duration_text);
-		free(duration_text);
+	retval = flash_driver_erase(p, first, last);
+
+	if ((ERROR_OK == retval) && (duration_measure(&bench) == ERROR_OK))
+	{
+		command_print(cmd_ctx, "erased sectors %" PRIu32 " "
+				"through %" PRIu32" on flash bank %" PRIu32 " "
+				"in %fs", first, last, bank_nr, duration_elapsed(&bench));
 	}
 
 	return ERROR_OK;
@@ -683,10 +678,7 @@ static int handle_flash_write_image_command(struct command_context_s *cmd_ctx, c
 	image_t image;
 	uint32_t written;
 
-	duration_t duration;
-	char *duration_text;
-
-	int retval, retvaltemp;
+	int retval;
 
 	if (argc < 1)
 	{
@@ -728,7 +720,8 @@ static int handle_flash_write_image_command(struct command_context_s *cmd_ctx, c
 		return ERROR_FAIL;
 	}
 
-	duration_start_measure(&duration);
+	struct duration bench;
+	duration_start(&bench);
 
 	if (argc >= 2)
 	{
@@ -756,23 +749,13 @@ static int handle_flash_write_image_command(struct command_context_s *cmd_ctx, c
 		return retval;
 	}
 
-	if ((retvaltemp = duration_stop_measure(&duration, &duration_text)) != ERROR_OK)
+	if ((ERROR_OK == retval) && (duration_measure(&bench) == ERROR_OK))
 	{
-		image_close(&image);
-		return retvaltemp;
+		command_print(cmd_ctx, "wrote %" PRIu32 " byte from file %s "
+				"in %fs (%0.3f kb/s)", written, args[0],
+				duration_elapsed(&bench), duration_kbps(&bench, written));
 	}
 
-	float speed;
-
-	speed = written / 1024.0;
-	speed /= ((float)duration.duration.tv_sec
-			+ ((float)duration.duration.tv_usec / 1000000.0));
-	command_print(cmd_ctx,
-			"wrote %" PRIu32 " byte from file %s in %s (%f kb/s)",
-			written, args[0], duration_text, speed);
-
-	free(duration_text);
-
 	image_close(&image);
 
 	return retval;
@@ -780,7 +763,7 @@ static int handle_flash_write_image_command(struct command_context_s *cmd_ctx, c
 
 static int handle_flash_fill_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
 {
-	int err = ERROR_OK, retval;
+	int err = ERROR_OK;
 	uint32_t address;
 	uint32_t pattern;
 	uint32_t count;
@@ -789,8 +772,6 @@ static int handle_flash_fill_command(struct command_context_s *cmd_ctx, char *cm
 	uint32_t wrote = 0;
 	uint32_t cur_size = 0;
 	uint32_t chunk_count;
-	char *duration_text;
-	duration_t duration;
 	target_t *target = get_current_target(cmd_ctx);
 	uint32_t i;
 	uint32_t wordsize;
@@ -843,7 +824,8 @@ static int handle_flash_fill_command(struct command_context_s *cmd_ctx, char *cm
 		exit(-1);
 	}
 
-	duration_start_measure(&duration);
+	struct duration bench;
+	duration_start(&bench);
 
 	for (wrote = 0; wrote < (count*wordsize); wrote += cur_size)
 	{
@@ -872,24 +854,14 @@ static int handle_flash_fill_command(struct command_context_s *cmd_ctx, char *cm
 				return ERROR_FAIL;
 			}
 		}
-
 	}
 
-	if ((retval = duration_stop_measure(&duration, &duration_text)) != ERROR_OK)
+	if (duration_measure(&bench) == ERROR_OK)
 	{
-		return retval;
+		command_print(cmd_ctx, "wrote %" PRIu32 " bytes to 0x%8.8" PRIx32 
+				" in %fs (%0.3f kb/s)", wrote, address,
+				duration_elapsed(&bench), duration_kbps(&bench, wrote));
 	}
-
-	float speed;
-
-	speed = wrote / 1024.0;
-	speed /= ((float)duration.duration.tv_sec
-			+ ((float)duration.duration.tv_usec / 1000000.0));
-	command_print(cmd_ctx,
-			"wrote %" PRIu32 " bytes to 0x%8.8" PRIx32 " in %s (%f kb/s)",
-			wrote, address, duration_text, speed);
-
-	free(duration_text);
 	return ERROR_OK;
 }
 
@@ -898,17 +870,13 @@ static int handle_flash_write_bank_command(struct command_context_s *cmd_ctx, ch
 	uint32_t offset;
 	uint8_t *buffer;
 	uint32_t buf_cnt;
-
 	fileio_t fileio;
 
-	duration_t duration;
-	char *duration_text;
-
-
 	if (argc != 3)
 		return ERROR_COMMAND_SYNTAX_ERROR;
 
-	duration_start_measure(&duration);
+	struct duration bench;
+	duration_start(&bench);
 
 	flash_bank_t *p;
 	int retval = flash_command_get_bank_by_num(cmd_ctx, args[0], &p);
@@ -935,24 +903,13 @@ static int handle_flash_write_bank_command(struct command_context_s *cmd_ctx, ch
 	free(buffer);
 	buffer = NULL;
 
-	int retvaltemp;
-	if ((retvaltemp = duration_stop_measure(&duration, &duration_text)) != ERROR_OK)
-	{
-		fileio_close(&fileio);
-		return retvaltemp;
-	}
-	if (retval == ERROR_OK)
+	if ((ERROR_OK == retval) && (duration_measure(&bench) == ERROR_OK))
 	{
-		float elapsed = (float)duration.duration.tv_sec;
-		elapsed += (float)duration.duration.tv_usec / 1000000.0;
-		float speed = (float)fileio.size / elapsed;
-		command_print(cmd_ctx,
-				"wrote  %lld byte from file %s to flash bank %u "
-				"at offset 0x%8.8" PRIx32 " in %s (%f kb/s)",
+		command_print(cmd_ctx, "wrote %lld byte from file %s to flash bank %u"
+				" at offset 0x%8.8" PRIx32 " in %fs (%0.3f kb/s)",
 				fileio.size, args[1], p->bank_number, offset,
-				duration_text, speed / 1024);
+				duration_elapsed(&bench), duration_kbps(&bench, fileio.size));
 	}
-	free(duration_text);
 
 	fileio_close(&fileio);
 
diff --git a/src/flash/mflash.c b/src/flash/mflash.c
index bf759c97..5a392a4d 100644
--- a/src/flash/mflash.c
+++ b/src/flash/mflash.c
@@ -215,11 +215,11 @@ static int mg_dsk_wait(mg_io_type_wait wait, uint32_t time)
 	uint8_t status, error;
 	target_t *target = mflash_bank->target;
 	uint32_t mg_task_reg = mflash_bank->base + MG_REG_OFFSET;
-	duration_t duration;
 	int ret;
 	long long t = 0;
 
-	duration_start_measure(&duration);
+	struct duration bench;
+	duration_start(&bench);
 
 	while (time) {
 
@@ -275,10 +275,11 @@ static int mg_dsk_wait(mg_io_type_wait wait, uint32_t time)
 			}
 		}
 
-		duration_stop_measure(&duration, NULL);
-
-		t = duration.duration.tv_usec/1000;
-		t += duration.duration.tv_sec*1000;
+		ret = duration_measure(&bench);
+		if (ERROR_OK == ret)
+			t = duration_elapsed(&bench) * 1000.0;
+		else
+			LOG_ERROR("mflash: duration measurement failed: %d", ret);
 
 		if (t > time)
 			break;
@@ -427,14 +428,14 @@ static int mg_mflash_do_read_sects(void *buff, uint32_t sect_num, uint32_t sect_
 	int ret;
 	target_t *target = mflash_bank->target;
 	uint8_t *buff_ptr = buff;
-	duration_t duration;
 
 	if ((ret = mg_dsk_io_cmd(sect_num, sect_cnt, mg_io_cmd_read)) != ERROR_OK)
 		return ret;
 
 	address = mflash_bank->base + MG_BUFFER_OFFSET;
 
-	duration_start_measure(&duration);
+	struct duration bench;
+	duration_start(&bench);
 
 	for (i = 0; i < sect_cnt; i++) {
 		ret = mg_dsk_wait(mg_io_wait_drq, MG_OEM_DISK_WAIT_TIME_NORMAL);
@@ -453,11 +454,10 @@ static int mg_mflash_do_read_sects(void *buff, uint32_t sect_num, uint32_t sect_
 
 		LOG_DEBUG("mflash: %" PRIu32 " (0x%8.8" PRIx32 ") sector read", sect_num + i, (sect_num + i) * MG_MFLASH_SECTOR_SIZE);
 
-		duration_stop_measure(&duration, NULL);
-
-		if ((duration.duration.tv_sec * 1000 + duration.duration.tv_usec / 1000) > 3000) {
+		ret = duration_measure(&bench);
+		if ((ERROR_OK == ret) && (duration_elapsed(&bench) > 3)) {
 			LOG_INFO("mflash: read %" PRIu32 "'th sectors", sect_num + i);
-			duration_start_measure(&duration);
+			duration_start(&bench);
 		}
 	}
 
@@ -500,14 +500,14 @@ static int mg_mflash_do_write_sects(void *buff, uint32_t sect_num, uint32_t sect
 	int ret;
 	target_t *target = mflash_bank->target;
 	uint8_t *buff_ptr = buff;
-	duration_t duration;
 
 	if ((ret = mg_dsk_io_cmd(sect_num, sect_cnt, cmd)) != ERROR_OK)
 		return ret;
 
 	address = mflash_bank->base + MG_BUFFER_OFFSET;
 
-	duration_start_measure(&duration);
+	struct duration bench;
+	duration_start(&bench);
 
 	for (i = 0; i < sect_cnt; i++) {
 		ret = mg_dsk_wait(mg_io_wait_drq, MG_OEM_DISK_WAIT_TIME_NORMAL);
@@ -526,11 +526,10 @@ static int mg_mflash_do_write_sects(void *buff, uint32_t sect_num, uint32_t sect
 
 		LOG_DEBUG("mflash: %" PRIu32 " (0x%8.8" PRIx32 ") sector write", sect_num + i, (sect_num + i) * MG_MFLASH_SECTOR_SIZE);
 
-		duration_stop_measure(&duration, NULL);
-
-		if ((duration.duration.tv_sec * 1000 + duration.duration.tv_usec / 1000) > 3000) {
+		ret = duration_measure(&bench);
+		if ((ERROR_OK == ret) && (duration_elapsed(&bench) > 3)) {
 			LOG_INFO("mflash: wrote %" PRIu32 "'th sectors", sect_num + i);
-			duration_start_measure(&duration);
+			duration_start(&bench);
 		}
 	}
 
@@ -708,8 +707,6 @@ static int mg_write_cmd(struct command_context_s *cmd_ctx, char *cmd, char **arg
 	uint32_t address, buf_cnt, cnt, res, i;
 	uint8_t *buffer;
 	fileio_t fileio;
-	duration_t duration;
-	char *duration_text;
 	int ret;
 
 	if (argc != 3) {
@@ -731,7 +728,8 @@ static int mg_write_cmd(struct command_context_s *cmd_ctx, char *cmd, char **arg
 	cnt = fileio.size / MG_FILEIO_CHUNK;
 	res = fileio.size % MG_FILEIO_CHUNK;
 
-	duration_start_measure(&duration);
+	struct duration bench;
+	duration_start(&bench);
 
 	for (i = 0; i < cnt; i++) {
 		if ((ret = fileio_read(&fileio, MG_FILEIO_CHUNK, buffer, &buf_cnt)) !=
@@ -749,21 +747,19 @@ static int mg_write_cmd(struct command_context_s *cmd_ctx, char *cmd, char **arg
 			goto mg_write_cmd_err;
 	}
 
-	duration_stop_measure(&duration, &duration_text);
-
-	command_print(cmd_ctx, "wrote %lli byte from file %s in %s (%f kB/s)",
-		fileio.size, args[1], duration_text,
-		(float)fileio.size / 1024.0 / ((float)duration.duration.tv_sec + ((float)duration.duration.tv_usec / 1000000.0)));
+	if (duration_measure(&bench) == ERROR_OK)
+	{
+		command_print(cmd_ctx, "wrote %lli byte from file %s "
+				"in %fs (%0.3f kB/s)", fileio.size, args[1],
+				duration_elapsed(&bench), duration_kbps(&bench, fileio.size));
+	}
 
-	free(duration_text);
 	free(buffer);
 	fileio_close(&fileio);
 
 	return ERROR_OK;
 
 mg_write_cmd_err:
-	duration_stop_measure(&duration, &duration_text);
-	free(duration_text);
  	free(buffer);
 	fileio_close(&fileio);
 
@@ -775,8 +771,6 @@ static int mg_dump_cmd(struct command_context_s *cmd_ctx, char *cmd, char **args
 	uint32_t address, size_written, size, cnt, res, i;
 	uint8_t *buffer;
 	fileio_t fileio;
-	duration_t duration;
-	char *duration_text;
 	int ret;
 
 	if (argc != 4) {
@@ -799,7 +793,8 @@ static int mg_dump_cmd(struct command_context_s *cmd_ctx, char *cmd, char **args
 	cnt = size / MG_FILEIO_CHUNK;
 	res = size % MG_FILEIO_CHUNK;
 
-	duration_start_measure(&duration);
+	struct duration bench;
+	duration_start(&bench);
 
 	for (i = 0; i < cnt; i++) {
 		if ((ret = mg_mflash_read(address, buffer, MG_FILEIO_CHUNK)) != ERROR_OK)
@@ -817,21 +812,20 @@ static int mg_dump_cmd(struct command_context_s *cmd_ctx, char *cmd, char **args
 			goto mg_dump_cmd_err;
 	}
 
-	duration_stop_measure(&duration, &duration_text);
-
-	command_print(cmd_ctx, "dump image (address 0x%8.8" PRIx32 " size %" PRIu32 ") to file %s in %s (%f kB/s)",
-				address, size, args[1], duration_text,
-				(float)size / 1024.0 / ((float)duration.duration.tv_sec + ((float)duration.duration.tv_usec / 1000000.0)));
+	if (duration_measure(&bench) == ERROR_OK)
+	{
+		command_print(cmd_ctx, "dump image (address 0x%8.8" PRIx32 " "
+				"size %" PRIu32 ") to file %s in %fs (%0.3f kB/s)",
+				address, size, args[1],
+				duration_elapsed(&bench), duration_kbps(&bench, size));
+	}
 
-	free(duration_text);
 	free(buffer);
 	fileio_close(&fileio);
 
 	return ERROR_OK;
 
 mg_dump_cmd_err:
-	duration_stop_measure(&duration, &duration_text);
-	free(duration_text);
  	free(buffer);
 	fileio_close(&fileio);
 
diff --git a/src/flash/nand.c b/src/flash/nand.c
index 81a04f7a..8f67624d 100644
--- a/src/flash/nand.c
+++ b/src/flash/nand.c
@@ -1330,8 +1330,6 @@ static int handle_nand_write_command(struct command_context_s *cmd_ctx, char *cm
 
 	fileio_t fileio;
 
-	duration_t duration;
-	char *duration_text;
 
 	if (argc < 3)
 	{
@@ -1372,7 +1370,8 @@ static int handle_nand_write_command(struct command_context_s *cmd_ctx, char *cm
 		}
 	}
 
-	duration_start_measure(&duration);
+	struct duration bench;
+	duration_start(&bench);
 
 	if (fileio_open(&fileio, args[1], FILEIO_READ, FILEIO_BINARY) != ERROR_OK)
 	{
@@ -1478,11 +1477,13 @@ static int handle_nand_write_command(struct command_context_s *cmd_ctx, char *cm
 	free(page);
 	oob = NULL;
 	page = NULL;
-	duration_stop_measure(&duration, &duration_text);
-	command_print(cmd_ctx, "wrote file %s to NAND flash %s up to offset 0x%8.8" PRIx32 " in %s",
-		args[1], args[0], offset, duration_text);
-	free(duration_text);
-	duration_text = NULL;
+	if (duration_measure(&bench) == ERROR_OK)
+	{
+		command_print(cmd_ctx, "wrote file %s to NAND flash %s "
+			"up to offset 0x%8.8" PRIx32 " in %fs (%0.3f kb/s)",
+			args[1], args[0], offset, duration_elapsed(&bench),
+			duration_kbps(&bench, fileio.size));
+	}
 
 	return ERROR_OK;
 }
@@ -1506,8 +1507,6 @@ static int handle_nand_dump_command(struct command_context_s *cmd_ctx, char *cmd
 	}
 
 	fileio_t fileio;
-	duration_t duration;
-	char *duration_text;
 
 	uint8_t *page = NULL;
 	uint32_t page_size = 0;
@@ -1560,7 +1559,8 @@ static int handle_nand_dump_command(struct command_context_s *cmd_ctx, char *cmd
 		return ERROR_OK;
 	}
 
-	duration_start_measure(&duration);
+	struct duration bench;
+	duration_start(&bench);
 
 	while (size > 0)
 	{
@@ -1596,10 +1596,12 @@ static int handle_nand_dump_command(struct command_context_s *cmd_ctx, char *cmd
 	oob = NULL;
 	fileio_close(&fileio);
 
-	duration_stop_measure(&duration, &duration_text);
-	command_print(cmd_ctx, "dumped %lld byte in %s", fileio.size, duration_text);
-	free(duration_text);
-	duration_text = NULL;
+	if (duration_measure(&bench) == ERROR_OK)
+	{
+		command_print(cmd_ctx, "dumped %lld byte in %fs (%0.3f kb/s)",
+			fileio.size, duration_elapsed(&bench),
+			duration_kbps(&bench, fileio.size));
+	}
 
 	return ERROR_OK;
 }
diff --git a/src/helper/time_support.c b/src/helper/time_support.c
index 865f2456..9b86e52f 100644
--- a/src/helper/time_support.c
+++ b/src/helper/time_support.c
@@ -28,7 +28,6 @@
 #endif
 
 #include "time_support.h"
-#include "log.h"
 
 
 /* calculate difference between two struct timeval values */
@@ -83,29 +82,30 @@ int timeval_add_time(struct timeval *result, int sec, int usec)
 	return 0;
 }
 
-void duration_start_measure(duration_t *duration)
+int duration_start(struct duration *duration)
 {
-	gettimeofday(&duration->start, NULL);
+	return gettimeofday(&duration->start, NULL);
 }
 
-int duration_stop_measure(duration_t *duration, char **text)
+int duration_measure(struct duration *duration)
 {
 	struct timeval end;
+	int retval = gettimeofday(&end, NULL);
+	if (0 == retval)
+		timeval_subtract(&duration->elapsed, &end, &duration->start);
+	return retval;
+}
 
-	gettimeofday(&end, NULL);
-
-	timeval_subtract(&duration->duration, &end, &duration->start);
-
-	if (text)
-	{
-		float t;
-		t = duration->duration.tv_sec;
-		t += (float)duration->duration.tv_usec/1000000.0;
-		*text = malloc(100);
-		snprintf(*text, 100, "%fs", t);
-	}
+float duration_elapsed(struct duration *duration)
+{
+	float t = duration->elapsed.tv_sec;
+	t += (float)duration->elapsed.tv_usec / 1000000.0;
+	return t;
+}
 
-	return ERROR_OK;
+float duration_kbps(struct duration *duration, size_t count)
+{
+	return count / (1024.0 * duration_elapsed(duration));
 }
 
 long long timeval_ms()
diff --git a/src/helper/time_support.h b/src/helper/time_support.h
index a8036766..9e8e61f1 100644
--- a/src/helper/time_support.h
+++ b/src/helper/time_support.h
@@ -37,19 +37,27 @@
 # endif
 #endif
 
-extern int timeval_subtract(struct timeval *result, struct timeval *x, struct timeval *y);
-extern int timeval_add(struct timeval *result, struct timeval *x, struct timeval *y);
-extern int timeval_add_time(struct timeval *result, int sec, int usec);
-/* gettimeofday() timeval in 64 bit ms */
-extern long long timeval_ms(void);
+int timeval_subtract(struct timeval *result, struct timeval *x, struct timeval *y);
+int timeval_add(struct timeval *result, struct timeval *x, struct timeval *y);
+int timeval_add_time(struct timeval *result, int sec, int usec);
 
-typedef struct duration_s
+/// @returns gettimeofday() timeval as 64-bit in ms
+long long timeval_ms(void);
+
+struct duration
 {
 	struct timeval start;
-	struct timeval duration;
-} duration_t;
+	struct timeval elapsed;
+};
+
+/// Update the duration->start field to start the @a duration measurement.
+int duration_start(struct duration *duration);
+/// Update the duration->elapsed field to finish the @a duration measurment.
+int duration_measure(struct duration *duration);
 
-extern void duration_start_measure(duration_t *duration);
-extern int duration_stop_measure(duration_t *duration, char **text);
+/// @returns Elapsed time in seconds.
+float duration_elapsed(struct duration *duration);
+/// @returns KB/sec for the elapsed @a duration and @a count bytes.
+float duration_kbps(struct duration *duration, size_t count);
 
 #endif /* TIME_SUPPORT_H */
diff --git a/src/target/target.c b/src/target/target.c
index 5eec09c8..3e4c00d0 100644
--- a/src/target/target.c
+++ b/src/target/target.c
@@ -2507,20 +2507,17 @@ static int handle_load_image_command(struct command_context_s *cmd_ctx, char *cm
 	uint32_t min_address = 0;
 	uint32_t max_address = 0xffffffff;
 	int i;
-	int retvaltemp;
-
 	image_t image;
 
-	duration_t duration;
-	char *duration_text;
-
 	int retval = parse_load_image_command_args(cmd_ctx, args, argc,
 			&image, &min_address, &max_address);
 	if (ERROR_OK != retval)
 		return retval;
 
 	target_t *target = get_current_target(cmd_ctx);
-	duration_start_measure(&duration);
+
+	struct duration bench;
+	duration_start(&bench);
 
 	if (image_open(&image, args[0], (argc >= 3) ? args[2] : NULL) != ERROR_OK)
 	{
@@ -2580,20 +2577,13 @@ static int handle_load_image_command(struct command_context_s *cmd_ctx, char *cm
 		free(buffer);
 	}
 
-	if ((retvaltemp = duration_stop_measure(&duration, &duration_text)) != ERROR_OK)
+	if ((ERROR_OK == retval) && (duration_measure(&bench) == ERROR_OK))
 	{
-		image_close(&image);
-		return retvaltemp;
+		command_print(cmd_ctx, "downloaded %" PRIu32 " bytes "
+				"in %fs (%0.3f kb/s)", image_size,
+				duration_elapsed(&bench), duration_kbps(&bench, image_size));
 	}
 
-	if (retval == ERROR_OK)
-	{
-		command_print(cmd_ctx, "downloaded %u byte in %s",
-					  (unsigned int)image_size,
-					  duration_text);
-	}
-	free(duration_text);
-
 	image_close(&image);
 
 	return retval;
@@ -2607,8 +2597,6 @@ static int handle_dump_image_command(struct command_context_s *cmd_ctx, char *cm
 	uint8_t buffer[560];
 	int retvaltemp;
 
-	duration_t duration;
-	char *duration_text;
 
 	target_t *target = get_current_target(cmd_ctx);
 
@@ -2628,7 +2616,8 @@ static int handle_dump_image_command(struct command_context_s *cmd_ctx, char *cm
 		return ERROR_OK;
 	}
 
-	duration_start_measure(&duration);
+	struct duration bench;
+	duration_start(&bench);
 
 	int retval = ERROR_OK;
 	while (size > 0)
@@ -2654,14 +2643,11 @@ static int handle_dump_image_command(struct command_context_s *cmd_ctx, char *cm
 	if ((retvaltemp = fileio_close(&fileio)) != ERROR_OK)
 		return retvaltemp;
 
-	if ((retvaltemp = duration_stop_measure(&duration, &duration_text)) != ERROR_OK)
-		return retvaltemp;
-
-	if (retval == ERROR_OK)
+	if ((ERROR_OK == retval) && (duration_measure(&bench) == ERROR_OK))
 	{
-		command_print(cmd_ctx, "dumped %lld byte in %s",
-				fileio.size, duration_text);
-		free(duration_text);
+		command_print(cmd_ctx,
+				"dumped %lld bytes in %fs (%0.3f kb/s)", fileio.size,
+				duration_elapsed(&bench), duration_kbps(&bench, fileio.size));
 	}
 
 	return retval;
@@ -2673,15 +2659,12 @@ static int handle_verify_image_command_internal(struct command_context_s *cmd_ct
 	uint32_t buf_cnt;
 	uint32_t image_size;
 	int i;
-	int retval, retvaltemp;
+	int retval;
 	uint32_t checksum = 0;
 	uint32_t mem_checksum = 0;
 
 	image_t image;
 
-	duration_t duration;
-	char *duration_text;
-
 	target_t *target = get_current_target(cmd_ctx);
 
 	if (argc < 1)
@@ -2695,7 +2678,8 @@ static int handle_verify_image_command_internal(struct command_context_s *cmd_ct
 		return ERROR_FAIL;
 	}
 
-	duration_start_measure(&duration);
+	struct duration bench;
+	duration_start(&bench);
 
 	if (argc >= 2)
 	{
@@ -2802,20 +2786,12 @@ static int handle_verify_image_command_internal(struct command_context_s *cmd_ct
 		image_size += buf_cnt;
 	}
 done:
-
-	if ((retvaltemp = duration_stop_measure(&duration, &duration_text)) != ERROR_OK)
-	{
-		image_close(&image);
-		return retvaltemp;
-	}
-
-	if (retval == ERROR_OK)
+	if ((ERROR_OK == retval) && (duration_measure(&bench) == ERROR_OK))
 	{
-		command_print(cmd_ctx, "verified %u bytes in %s",
-					  (unsigned int)image_size,
-					  duration_text);
+		command_print(cmd_ctx, "verified %" PRIu32 " bytes "
+				"in %fs (%0.3f kb/s)", image_size,
+				duration_elapsed(&bench), duration_kbps(&bench, image_size));
 	}
-	free(duration_text);
 
 	image_close(&image);
 
@@ -4672,15 +4648,13 @@ static int handle_fast_load_image_command(struct command_context_s *cmd_ctx, cha
 
 	image_t image;
 
-	duration_t duration;
-	char *duration_text;
-
 	int retval = parse_load_image_command_args(cmd_ctx, args, argc,
 			&image, &min_address, &max_address);
 	if (ERROR_OK != retval)
 		return retval;
 
-	duration_start_measure(&duration);
+	struct duration bench;
+	duration_start(&bench);
 
 	if (image_open(&image, args[0], (argc >= 3) ? args[2] : NULL) != ERROR_OK)
 	{
@@ -4753,13 +4727,16 @@ static int handle_fast_load_image_command(struct command_context_s *cmd_ctx, cha
 		free(buffer);
 	}
 
-	duration_stop_measure(&duration, &duration_text);
-	if (retval == ERROR_OK)
+	if ((ERROR_OK == retval) && (duration_measure(&bench) == ERROR_OK))
 	{
-		command_print(cmd_ctx, "Loaded %u bytes in %s", (unsigned int)image_size, duration_text);
-		command_print(cmd_ctx, "NB!!! image has not been loaded to target, issue a subsequent 'fast_load' to do so.");
+		command_print(cmd_ctx, "Loaded %" PRIu32 " bytes "
+				"in %fs (%0.3f kb/s)", image_size, 
+				duration_elapsed(&bench), duration_kbps(&bench, image_size));
+
+		command_print(cmd_ctx,
+				"WARNING: image has not been loaded to target!"
+				"You can issue a 'fast_load' to finish loading.");
 	}
-	free(duration_text);
 
 	image_close(&image);