tulpa-envvars: Environment variables tulpa reads

In tulpa: Templated Unified Library for Posterior Approximation in Bayesian Hierarchical Models

Environment variables tulpa reads

Description

Switches read from the process environment rather than from a fitter's control list, because each one changes how the compiled kernels partition work or which tests run rather than what model is fitted.

Parallel scatter

TULPA_SCATTER_FORCE_PARALLEL=1

Takes the per-thread parallel fill of an uncoupled arm's per-observation scatter whatever its size, instead of only where the fill work outweighs the per-thread buffers. Read on every scatter call, so it can be set within a session.

The cell-coupled scatter needs no switch: its cells are split into a fixed number of chunks set by the cell count alone, so a fit returns the same numbers at every thread count.

Test-suite tiers

TULPA_FAST, TULPA_SLOW_TESTS and TULPA_FULL_RECOVERY select which cost tier of the test suite runs; they are read by the suite, not by the package, and are described in tests/testthat/README.md.

tulpa documentation built on Oct. 19, 2026, 5:09 p.m.