Removed line, dont abs

pytorch_lightning/overrides/fairscale.py

@@ -18,7 +18,6 @@ except (ModuleNotFoundError, ImportError):
 else:
     FAIRSCALE_SHARDED_AVAILABLE = True
 
-
     class LightningShardedDataParallel(ShardedDataParallel):
 
         def forward(self, *inputs, **kwargs):

tests/plugins/test_sharded_plugin.py

@@ -522,7 +522,8 @@ def run_sharded_correctness(
         assert torch.equal(ddp_param, shard_param), 'Model parameters are different between DDP and Sharded plugin'
 
     # Assert speed parity by ensuring percentage difference between sharded/ddp is below threshold
-    percent_diff = (abs(sharded_time - ddp_time) / sharded_time)
+    percent_diff = (sharded_time - ddp_time) / sharded_time
+
     assert percent_diff <= max_percent_speed_diff, \
         f'Sharded plugin was too slow compared to DDP, Sharded Time: {sharded_time}, DDP Time: {ddp_time}'