SERVER-28099 Use key rather than cmp in libdeps.py sorted_by_str

From the python docs: "In general, the key and reverse conversion processes
are much faster than specifying an equivalent cmp function. This is because
cmp is called multiple times for each list element while key and reverse touch
each element only once."

1 files changed, 1 insertions, 1 deletions

diff --git a/site_scons/libdeps.py b/site_scons/libdeps.py
index c20eb881d0a..153c551290b 100644
--- a/site_scons/libdeps.py
+++ b/site_scons/libdeps.py
@@ -68,7 +68,7 @@ def sorted_by_str(iterable):
     across invocations of SCons.  Since dependency order changes force rebuilds,
     we use this sort to create stable dependency orders.
     """
-    return sorted(iterable, cmp=lambda lhs, rhs: cmp(str(lhs), str(rhs)))
+    return sorted(iterable, key=str)
 
 class DependencyCycleError(SCons.Errors.UserError):
     """Exception representing a cycle discovered in library dependencies."""