WP-34S function execution speed ?

[Gene Wright]

Is there a table somewhere that lists the functions and how long it takes for each to execute?

I know some are variable depending on the input arguments, but I didn't see such a table in the manual.

For example, something like this:

+ 5ms

- 11ms

SIN 200ms

etc

?

[Paul Dale]

No.

Fast or slow mode? With or without crystal? Which firmware version?

- Pauli

[Gene Wright]

Pauli, that's an answer I would expect from HP! :-) I think several versions should be available.

At the very least, non-crystal, slow mode, version 2 and version 3 firmware.

I would suspect a very small percentage of units have the crystal.

Fast mode could be generalized as X% faster than slow mode.

It seems to me :-) that *some* list should be available...or else how will non-developers know which instructions slow down their programming contest entries this year at HHC 2013?

[Steve Simpkin]

Quote:

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It seems to me :-) that *some* list should be available...or else how will non-developers know which instructions slow down their programming contest entries this year at HHC 2013?

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Some mysteries are better left discovered. The fun is in the journey, the destination is the reward.

[Paul Dale]

Quote:

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At the very least, non-crystal, slow mode, version 2 and version 3 firmware.

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Non crystal timings are quite variable. That is the point of having a crystal.

Firmware versions would ideally have to be more finely grained than just 2 and 3. Marcus and I made a lot of space/time tradeoffs during the development of 3. The obvious way to deal with this is to benchmark the latest version 2 and version 3 revisions. Firmware version 3 is unlikely to change significantly now so it wouldn't need regular major revisions anymore.

Quote:

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It seems to me :-) that *some* list should be available...or else how will non-developers know which instructions slow down their programming contest entries this year at HHC 2013?

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Sounds like you've found a project :-)

It is straightforward to write timing loops using the TICKS command and check each instruction as required. That's what I've done in the past when performance was an issue (re-implementing LN mostly). Something along the lines of:

        LBL A

        EEX

        3

        STO 00

        TICKS

        STO 01

        LBL 00

                [<->] ZZZZ

                function

        DSZ 00

        GTO 00

        TICKS

        RCL- 01

        RTN

I don't believe anyone knows the instruction timings -- I certainly don't. For most instructions I don't even have a feel as to their relative timings.

One thing I am confident about, however, is that Version 2 firmware will be faster than version 3 pretty much across the board. Many space for time tradeoffs were made in version 3 to squeeze the significant extra functionality in.

- Pauli