Meter_gen option -debug:

From the usage message:

'-debug ([boolean])':
	with boolean is like 'true'/'false' (string ignoring case, or boolean type in json config file)
	print information on console while generating (time spent, memory used, current progress).

	Without boolean value, equivalent to '-debug true'
	If no option debug, equivalent to '-debug false'

During execution, will print something like the following:

init: 59.447ms
meters: 100 /100 (100%), memory: 35MB
meters: 890.379ms
data: 17569 /17569 (100%), memory: 37MB, generated: 230MB (3 file(s))
data: 20816.640ms
total: 21768.163ms

1st, printing time taken by Meter Gen to initialise, read parameters and configuration files (miliseconds).
init: 59.447ms

2nd, printing at each status change (maximum 5 times a second) of preparing meters parameters (location, type, meter id...).
It shows number of meters initialized, number of meters required, progress (%), and heap memory usage of Javascript.
meters: 100 /100 (100%), memory: 35MB

3rd, printing time taken to initialize all meters (miliseconds).
meters: 890.379ms

4th, printing at each status change (maximum 5 times a second) of generating data.
It shows number of data generated (number of dates interval done), number of data required, progress (%), and heap memory usage of Javascript.
It also show the total generated file size, and the number of generated files.
data: 17569 /17569 (100%), memory: 37MB, generated: 230MB (3 file(s))

5th, printing time taken to generate all data (miliseconds).
data: 20816.640ms

6th, printing time taken to do all from begin to end (miliseconds).
total: 21768.163ms