Valid values: | auto 1 2 (or higher) |
Default value: | auto |
Controls whether multi-threading mode is enabled on the LZMA compressor. Multi-threading can speed up the compression process by 50% or more on systems with multiple processor cores, and 20% or more on systems with single-core Intel processors featuring Hyper-Threading Technology.
A value of auto (the default) enables multi-threading mode when the compiler is running on a system with multiple processor cores or Hyper-Threading.
A value of 1 always disables multi-threading mode.
A value of 2 always enables multi-threading mode.
Values greater than 2 are also accepted, but have the same effect as 2. This is because the LZMA compressor currently cannot take advantage of more than two processor cores.