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Hi,

Tipoucet shows the high speed of the HP-39gII here compared to the Nspire CX CAS and Casio Prizm :

this confirms that 39GII is very fast.

Handling of graphics is also very fast (point, rectangle, text output etc.) and list or matrix manipulation

Here a program to draw the ULAM spiral

```EXPORT Ulam
BEGIN
LOCAL a,b,xy:={128,63}, n:=1, m:=.9, d:={{1,0}, {0,-1}, {-1,0}, {0,1}};
RECT();
WHILE n<60000 DO
FOR a FROM 1 TO 4 DO
m:=m+.5;
FOR b FROM 1 TO m DO
IF isprime(n) THEN PIXON_P(xy(1),xy(2),0);END;
xy:=xy+d(a);
n:=n+1;
END;
END;
END;
FREEZE;
END;
```

34 sec for 60.000 loops (and prime test)

Edited: 24 Feb 2013, 8:00 p.m.

From Xerxes' Calculator Benchmark:

``` Calculator Speed Benchmark using the N-Queens Problem
-------------------------------------------------------
-    1:30         HP-50G            UserRPL
-    1:29         TI-Nspire         Formula / List / TI-84+ Keypad / OS 3.0
-    1:13         TI-Nspire         Formula / List / TI-84+ Keypad / OS 1.2
-    1:10         TI-Nspire         Formula / List / TI-84+ Keypad / OS 1.3
-    1:07         HP-50G            UserRPL / Fast Mode x1.3 (75->203 MHz)
-       8.3       TI-Nspire CAS     Formula / List / OS 1.2
-       7.5       TI-Nspire         Formula / List / OS 1.2
-       4.2       TI-Nspire CAS     Formula / List / OS 1.3
-       3.9       TI-Nspire         Formula / List / OS 1.3
-------------------------------------------------------
-       2.3       TI-Nspire CAS     Formula / List / OS 3.0
-       2.1       TI-Nspire         Formula / List / OS 3.0
-       1.32      HP-39GII          Formula / List
-------------------------------------------------------
-       0.895     HP-50G            HP Pascal Studio 2.1 / Cross Compiler
-       0.622     HP-50G            HP Pascal Studio 2.1 / Cross Compiler / Fast Mode x1.5 (75->203 MHz)
-       0.243     HP-50G            HPLua 0.4 / Bytecode
-       0.0504    TI-Nspire CAS     Lua / Bytecode / OS 3.1
-       0.0445    TI-Nspire CX CAS  Lua / Bytecode / OS 3.1
-       0.00613   HP-50G            HPGCC 3.0 / RegVars / Cross Compiler / Slow Mode x12.7 (75->6.0 MHz)
-       0.00524   HP-50G            Assembly / ARM9 @ 6.0 MHz / Slow Mode x13
-       0.000484  HP-50G            HPGCC 3.0 / RegVars / Cross Compiler
-       0.000404  HP-50G            Assembly / ARM9 @ 75 MHz
-       0.000192  HP-50G            HPGCC 3.0 / RegVars / Cross Compiler / Fast Mode x2.5 (75->192 MHz)
-       0.000150  HP-50G            Assembly / ARM9 @ 192 MHz / Fast Mode x2.7
```

This is the inverse time (s-1):

```0.4348    TI-Nspire CAS
0.4762    TI-Nspire
0.7576    HP-39GII
```

Now the TI-Nspire doesn't look so bad anymore. Or even much better when considering Lua:

``` 19.84    TI-Nspire CAS
22.47    TI-Nspire CX CAS
```

Quote:
In any case, difficult to find a model for the time as fast as the HP-39gII that is surely the public calculator fastest in the world.

```,___,
{O,o}
|)__)
-”-”-
O RLY?
```

Kind regards

Thomas

Edited: 24 Feb 2013, 5:58 p.m.