instead of a list of Amounts. No longer export Mixed constructor, to
keep API clean (if you really need it, you can import it directly from
Hledger.Data.Types). We also ensure the JSON representation of
MixedAmount doesn't change: it is stored as a normalised list of
Amounts.
This commit improves performance. Here are some indicative results.
hledger reg -f examples/10000x1000x10.journal
- Maximum residency decreases from 65MB to 60MB (8% decrease)
- Total memory in use decreases from 178MiB to 157MiB (12% decrease)
hledger reg -f examples/10000x10000x10.journal
- Maximum residency decreases from 69MB to 60MB (13% decrease)
- Total memory in use decreases from 198MiB to 153MiB (23% decrease)
hledger bal -f examples/10000x1000x10.journal
- Total heap usage decreases from 6.4GB to 6.0GB (6% decrease)
- Total memory in use decreases from 178MiB to 153MiB (14% decrease)
hledger bal -f examples/10000x10000x10.journal
- Total heap usage decreases from 7.3GB to 6.9GB (5% decrease)
- Total memory in use decreases from 196MiB to 185MiB (5% decrease)
hledger bal -M -f examples/10000x1000x10.journal
- Total heap usage decreases from 16.8GB to 10.6GB (47% decrease)
- Total time decreases from 14.3s to 12.0s (16% decrease)
hledger bal -M -f examples/10000x10000x10.journal
- Total heap usage decreases from 108GB to 48GB (56% decrease)
- Total time decreases from 62s to 41s (33% decrease)
If you never directly use the constructor Mixed or pattern match against
it then you don't need to make any changes. If you do, then do the
following:
- If you really care about the individual Amounts and never normalise
your MixedAmount (for example, just storing `Mixed amts` and then
extracting `amts` as a pattern match, then use should switch to using
[Amount]. This should just involve removing the `Mixed` constructor.
- If you ever call `mixed`, `normaliseMixedAmount`, or do any sort of
amount arithmetic (+), (-), then you should replace the constructor
`Mixed` with the function `mixed`. To extract the list of Amounts, use
the function `amounts`.
- If you ever call `normaliseMixedAmountSquashPricesForDisplay`, you can
replace that with `mixedAmountStripPrices`. (N.B. this does something
slightly different from `normaliseMixedAmountSquashPricesForDisplay`,
but I don't think there's any use case for squashing prices and then
keeping the first of the squashed prices around. If you disagree let
me know.)
- Any remaining calls to `normaliseMixedAmount` can be removed, as that
is now the identity function.
Exceptions are for dealing with the pamount field, which is really just
dealing with an unnormalised list of amounts.
This creates an API for dealing with MixedAmount, so we never have to
access the internals outside of Hledger.Data.Amount.
Also remove a comment, since it looks like #1207 has been resolved.
supplant the old interface, which relied on the Num typeclass.
MixedAmount did not have a very good Num instance. The only functions
which were defined were fromInteger, (+), and negate. Furthermore, it
was not law-abiding, as 0 + a /= a in general. Replacements for used
functions are:
0 -> nullmixedamt / mempty
(+) -> maPlus / (<>)
(-) -> maMinus
negate -> maNegate
sum -> maSum
sumStrict -> maSum
Also creates some new constructors for MixedAmount:
mixedAmount :: Amount -> MixedAmount
maAddAmount :: MixedAmount -> Amount -> MixedAmount
maAddAmounts :: MixedAmount -> [Amount] -> MixedAmount
Add Semigroup and Monoid instances for MixedAmount.
Ideally we would remove the Num instance entirely.
The only change needed have nullmixedamt/mempty substitute for
0 without problems was to not squash prices in
mixedAmount(Looks|Is)Zero. This is correct behaviour in any case.
env -S isn't a thing on linux of course. Go back to using standard
env, which means using a stack options line, which means not using
"ghc". This new setup is probably simpler anyway. I've just had to
give up on the goal of having each script's required packages being
defined in one place; now (to they extent they are required) they
must be defined both in the script header and in compile.sh.
Using stack's script command meant that the scripts needed to be
compatible, and regularly tested, with a hledger release in stackage,
rather than the latest hledger source. This created hassles for
maintainers, contributors and sometimes for users.
To simplify things overall, we now require script users to check out
the hledger source tree and run the scripts (or, bin/compile.sh) from
there once so they compile themselves. Some notes on alternative
setups are included (in one of the scripts, and referenced by the
others). This ensures that users and our CI tests are building scripts
the same way.
Current stack does not allow a stack options line to be used with the
"stack ghc" command, unfortunately, so instead we are using env's -S
flag, which hopefully has sufficiently wide support by now, and
putting all arguments in the shebang line.
This method will probably require complete explicit --package options,
unlike "stack script", so more testing and tweaking is expected.
Probably we're going to end up with some long shebang lines.
This isn't pretty but seems like a possible way to keep things
manageable.
