factor_col

Stores factors as int32 codes plus shared levels metadata.

Provides a parallel execution runtime for R that emphasizes
deterministic memory behavior and efficient handling of large shared inputs.
'shard' enables zero-copy parallel reads via shared/memory-mapped segments,
encourages explicit output buffers to avoid large result aggregation, and
supervises worker processes to mitigate memory drift via controlled recycling.
Diagnostics report peak memory usage, end-of-run memory return, and hidden
copy/materialization events to support reproducible performance benchmarking.

Bradley Buchsbaum

shard

Deterministic, Zero-Copy Parallel Execution for R

factor_col function

<dl><dt>levels</dt>
<dd>Character vector of allowed levels.</dd></dl>

Arguments

Categorical column type — factor_col

<dl>

<dt>levels</dt>
<dd>Character vector of allowed levels.</dd>

</dl>

factor_col: Categorical column type

Description

Usage

Value

Arguments