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General performance improvements discussion

4

#### Summary: At the suggestion of @bob-carpenter, I'm opening this as a discussion thread for how to improve the performance of Stan both generally, and on specific platforms. These improvements...

blackwer

add tuple type to Stan language

11

#### Summary: add type `tuple` to Stan language. A `tuple` is a container type which consists of an ordered list of element types. In theory, the list could be length...

mitzimorris

Excuse my general C naivete but would it be possible at all to have stan write it's csvs using `O_APPEND` mode whereby thw writer looks for the end of the...

mike-lawrence

Low-rank ADVI

36

#### Submission Checklist - [x] Run unit tests: `./runTests.py src/test/unit` - [x] Run cpplint: `make cpplint` - [x] Declare copyright holder and open-source license: see below - [ ] Flesh...

wjn0

If model evaluates at initial conditions without autodiff but fails with autodiff then the error messages are not great

10

#### Summary: For instance, with an ODE model @jtimonen found output like this: ``` Rejecting initial value: Error evaluating the log probability at the initial value. Exception: ode_bdf_tol: Failed to...

bbbales2

Stepsize no longer reset to 1 if term_buffer = 0 (Issue #3023)

28

#### Submission Checklist - [x] Run unit tests: `./runTests.py src/test/unit` - [x] Run cpplint: `make cpplint` - [x] Declare copyright holder and open-source license: see below #### Summary Fix for...

bbbales2

Skip metric regularization if adapt window=0

3

#### Submission Checklist - [X] Run unit tests: `./runTests.py src/test/unit` - [X] Run cpplint: `make cpplint` - [X] Declare copyright holder and open-source license: see below #### Summary This came...

nhuurre

Don't do inverse metric decomposition every draw

9

Fix for Issue #2881 . This involved switching to setter/getters for interfacing with dense_e_point so I made the change for diag_e_point as well. I also changed all the set_metric verbage...

bbbales2

#### Submission Checklist - [x] Run unit tests: `./runTests.py src/test/unit` - [x] Run cpplint: `make cpplint` - [x] Declare copyright holder and open-source license: see below #### Summary Fix for...

bbbales2

"term_buffer = 0" leads to "# Step size = 1" in output csv

3

#### Summary: See title. A dense metric was used. CSV header: ``` # stan_version_major = 2 # stan_version_minor = 26 # stan_version_patch = 1 # model = log_discourse_comp_model # method...

funko-unko