From 3ca6ae3d8e05730da5bde67bb8b3763fe9c8faec Mon Sep 17 00:00:00 2001
From: Wilson Lin <code@wilsonl.in>
Date: Tue, 7 Jul 2020 21:08:39 +1000
Subject: [PATCH] Improve performance of char specs

---
 src/spec/codepoint.rs | 23 ++++++++++++++++++-----
 1 file changed, 18 insertions(+), 5 deletions(-)

diff --git a/src/spec/codepoint.rs b/src/spec/codepoint.rs
index d1790be..f71e0fb 100644
--- a/src/spec/codepoint.rs
+++ b/src/spec/codepoint.rs
@@ -1,51 +1,64 @@
 // Official spec defined code points.
 // See https://infra.spec.whatwg.org/#code-points for spec.
 
+// Also update gen/tries.json when changing here.
+// 0x09 | 0x0a | 0x0c | 0x0d | 0x20.
+static IS_WHITESPACE: [bool; 256] = [
+    false, false, false, false, false, false, false, false, false, true, true, false, true, true, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, true, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false,
+];
+
+#[inline(always)]
 pub fn is_whitespace(c: u8) -> bool {
-    // Also update gen/tries.json when changing here.
-    match c {
-        0x09 | 0x0a | 0x0c | 0x0d | 0x20 => true,
-        _ => false,
-    }
+    IS_WHITESPACE[c as usize]
 }
 
+#[inline(always)]
 pub fn is_c0_control(c: u8) -> bool {
     // c >= 0 is always true.
     c <= 0x1f
 }
 
+#[inline(always)]
 pub fn is_control(c: u8) -> bool {
     is_c0_control(c) || c >= 0x7f && c <= 0x9f
 }
 
+#[inline(always)]
 pub fn is_digit(c: u8) -> bool {
     c >= b'0' && c <= b'9'
 }
 
+#[inline(always)]
 pub fn is_upper_hex_digit(c: u8) -> bool {
     is_digit(c) || c >= b'A' && c <= b'F'
 }
 
+#[inline(always)]
 pub fn is_lower_hex_digit(c: u8) -> bool {
     is_digit(c) || c >= b'a' && c <= b'f'
 }
 
+#[inline(always)]
 pub fn is_hex_digit(c: u8) -> bool {
     is_upper_hex_digit(c) || is_lower_hex_digit(c)
 }
 
+#[inline(always)]
 pub fn is_upper_alpha(c: u8) -> bool {
     c >= b'A' && c <= b'Z'
 }
 
+#[inline(always)]
 pub fn is_lower_alpha(c: u8) -> bool {
     c >= b'a' && c <= b'z'
 }
 
+#[inline(always)]
 pub fn is_alpha(c: u8) -> bool {
     is_upper_alpha(c) || is_lower_alpha(c)
 }
 
+#[inline(always)]
 pub fn is_alphanumeric(c: u8) -> bool {
     is_digit(c) || is_alpha(c)
 }