@@ -8772,3 +8772,16 @@ system and gives an overview of their function and contents.
memory and become problematic with parallelism elsewhere in the build.
"50%" has been found to be a good value.
+ :term:`ZSTD_THREADS`
+ Specifies the number of parallel threads that should be used when
+ using ZStandard compression.
+
+ By default this scales with core count, but is never set less than 2
+ to ensure that multi-threaded mode is always used so that the output
+ file contents are deterministic. Builds will work with a value of 1
+ but the output will differ compared to the output from the compression
+ generated when more than one thread is used.
+
+ On systems where many tasks run in parallel, setting a limit to this
+ can be helpful in controlling system resource usage.
+