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-rw-r--r--docs/users_guide/debugging.rst1
1 files changed, 1 insertions, 0 deletions
diff --git a/docs/users_guide/debugging.rst b/docs/users_guide/debugging.rst
index 82d10e6e99..61a06b2e38 100644
--- a/docs/users_guide/debugging.rst
+++ b/docs/users_guide/debugging.rst
@@ -87,6 +87,7 @@ Dumping out compiler intermediate structures
:type: dynamic
Show allocation and runtime statistics for various stages of compilation.
+ Allocations are measured in bytes. Timings are measured in milliseconds.
GHC is a large program consisting of a number of stages. You can tell GHC to
dump information from various stages of compilation using the ``-ddump-⟨pass⟩``