Android Question smallest variables to save memory?

persianpowerman1 · Oct 31, 2013

hey guys... all i need to do is save a single letter in a variable... and save a single number in another...

is char the best use for that since string is quite big?
similarly...
is byte the best use for that since INT is quite big?

eg.
dim flag as char
char = "u"

.... the max i would only require to save is 1 alphabet...whats the most efficient way to handle this???
... the max number i would go till is 0 to 120... whats the most efficient way to handle this???

YO!han

Informatix · Oct 31, 2013

Byte (-128...127) = 8 bits
Char (Unicode) = 16 bits
so the winner is Byte for 255 different characters. Characters can be converted to bytes with the Asc function. Example:

B4X:

Dim b As Byte
b = Asc("é") - 128
Log(Chr(b + 128))

Erel · Oct 31, 2013

How many such characters / numbers do you want to store?

If I understand correctly you need one character and one number.

If you choose String and Int it will take about 10 bytes. If you choose Character and Byte it will be 2-3 bytes.
Is there any benefit from saving 7 bytes? No.

A single image that you are loading can easily take 500,000 bytes.

http://shreevatsa.wordpress.com/2008/05/16/premature-optimization-is-the-root-of-all-evil/

persianpowerman1 · Oct 31, 2013

yeah thanx..
erel that made a lot of sense. . i read the entire article.. and it was so true.. dont need to waste time about the efficiency of non critical code...
thanx again

Android Question smallest variables to save memory?

persianpowerman1

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Informatix

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Erel

B4X founder

persianpowerman1

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Android Question smallest variables to save memory?

persianpowerman1

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