Speed up anchor comparison when the version is the same

2021-06-02 12:24:00 +02:00
parent 11a3b8c5ce
commit 84fe7f50ac
1 changed files with 17 additions and 6 deletions
@@ -61,15 +61,26 @@ impl Anchor {
            (Anchor::End, _) | (_, Anchor::Start) => Ordering::Greater,
            (
                Anchor::Middle {
-                    bias: self_bias, ..
+                    offset: self_offset,
+                    bias: self_bias,
+                    version: self_version,
                },
                Anchor::Middle {
-                    bias: other_bias, ..
+                    offset: other_offset,
+                    bias: other_bias,
+                    version: other_version,
                },
-            ) => buffer
-                .full_offset_for_anchor(self)
-                .cmp(&buffer.full_offset_for_anchor(other))
-                .then_with(|| self_bias.cmp(&other_bias)),
+            ) => {
+                let offset_comparison = if self_version == other_version {
+                    self_offset.cmp(other_offset)
+                } else {
+                    buffer
+                        .full_offset_for_anchor(self)
+                        .cmp(&buffer.full_offset_for_anchor(other))
+                };
+
+                offset_comparison.then_with(|| self_bias.cmp(&other_bias))
+            }
        })
    }