feat: use more inline (#11)

Cargo.toml

@@ -13,9 +13,9 @@ keywords = ["string", "str", "volo"]
 
 [dependencies]
 bytes = "1"
-serde = { version = "1", optional = true, default_features = false }
+serde = { version = "1", optional = true, default-features = false }
 simdutf8 = { version = "0.1", features = ["aarch64_neon"] }
-redis = { version = "0.25", optional = true, default_features = false }
+redis = { version = "0.25", optional = true, default-features = false }
 itoa = { version = "1", optional = true }
 
 [features]
@@ -26,7 +26,6 @@ serde-unsafe = ["serde"]
 redis = ["dep:redis", "itoa"]
 redis-unsafe = ["redis"]
 
-
 [dev-dependencies]
 static_assertions = { version = "1" }
 criterion = { version = "0.5", features = ["html_reports"] }

src/lib.rs

@@ -78,18 +78,27 @@ impl FastStr {
     /// Create a new `FastStr` from an `Arc<str>`.
     #[inline]
     pub fn from_arc_str(s: Arc<str>) -> Self {
+        if Self::can_inline(&s) {
+            return Self::new(s);
+        }
         Self(Repr::from_arc_str(s))
     }
 
     /// Create a new `FastStr` from a `String`.
     #[inline]
     pub fn from_string(s: String) -> Self {
+        if Self::can_inline(&s) {
+            return Self::new(s);
+        }
         Self(Repr::from_string(s))
     }
 
     /// Create a new `FastStr` from an `Arc<String>`.
     #[inline]
     pub fn from_arc_string(s: Arc<String>) -> Self {
+        if Self::can_inline(&s) {
+            return Self::new(s.as_str());
+        }
         Self(Repr::from_arc_string(s))
     }
 
@@ -110,6 +119,10 @@ impl FastStr {
     /// `b` must be valid UTF-8.
     #[inline]
     pub unsafe fn from_bytes_unchecked(b: Bytes) -> Self {
+        let s = std::str::from_utf8_unchecked(&b);
+        if Self::can_inline(s) {
+            return Self::new(s);
+        }
         Self(Repr::from_bytes_unchecked(b))
     }
 
@@ -274,6 +287,10 @@ impl FastStr {
         }
         Self(Repr::Inline { len, buf })
     }
+
+    fn can_inline(s: &str) -> bool {
+        s.len() <= INLINE_CAP
+    }
 }
 
 impl Default for FastStr {