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Diffstat (limited to '')
| -rw-r--r-- | testing/benches/normalize_identifier.rs | 694 |
1 files changed, 694 insertions, 0 deletions
diff --git a/testing/benches/normalize_identifier.rs b/testing/benches/normalize_identifier.rs new file mode 100644 index 0000000..d84701d --- /dev/null +++ b/testing/benches/normalize_identifier.rs @@ -0,0 +1,694 @@ +use std::collections::HashSet; +use std::iter::FusedIterator; + +use criterion::{black_box, criterion_group, criterion_main, Criterion}; + +criterion_main!(benches); +criterion_group!(benches, functions); + +fn functions(c: &mut Criterion) { + let words = Words::default().collect::<Vec<_>>(); + + macro_rules! bench_function { + ($($func:ident)*) => { + for word in words.iter().collect::<HashSet<_>>() { + let linear: &str = normalize_identifier_linear(word); + $( + assert_eq!(linear, $func(word)); + )* + } + + $( + c.bench_function(stringify!($func), |b| { + b.iter(|| { + for s in &words { + black_box($func(black_box(s))); + } + }); + }); + )* + }; + } + + bench_function! { + normalize_identifier_linear + normalize_identifier_linear_replacement_only + normalize_identifier_bisect + normalize_identifier_bisect_replacement_only + normalize_identifier_linear_by_len + normalize_identifier_linear_by_len_replacement_only + normalize_identifier_bisect_by_len + normalize_identifier_bisect_by_len_replacement_only + normalize_identifier_phf + } +} + +fn normalize_identifier_linear(ident: &str) -> &str { + static USE_RAW: [(&str, &str); 47] = [ + ("abstract", "r#abstract"), + ("as", "r#as"), + ("async", "r#async"), + ("await", "r#await"), + ("become", "r#become"), + ("box", "r#box"), + ("break", "r#break"), + ("const", "r#const"), + ("continue", "r#continue"), + ("crate", "r#crate"), + ("do", "r#do"), + ("dyn", "r#dyn"), + ("else", "r#else"), + ("enum", "r#enum"), + ("extern", "r#extern"), + ("false", "r#false"), + ("final", "r#final"), + ("fn", "r#fn"), + ("for", "r#for"), + ("if", "r#if"), + ("impl", "r#impl"), + ("in", "r#in"), + ("let", "r#let"), + ("macro", "r#macro"), + ("match", "r#match"), + ("mod", "r#mod"), + ("move", "r#move"), + ("mut", "r#mut"), + ("override", "r#override"), + ("priv", "r#priv"), + ("pub", "r#pub"), + ("ref", "r#ref"), + ("return", "r#return"), + ("static", "r#static"), + ("struct", "r#struct"), + ("trait", "r#trait"), + ("true", "r#true"), + ("try", "r#try"), + ("type", "r#type"), + ("typeof", "r#typeof"), + ("unsafe", "r#unsafe"), + ("unsized", "r#unsized"), + ("use", "r#use"), + ("virtual", "r#virtual"), + ("where", "r#where"), + ("while", "r#while"), + ("yield", "r#yield"), + ]; + + if let Some(word) = USE_RAW.iter().find(|x| x.0 == ident) { + word.1 + } else { + ident + } +} + +fn normalize_identifier_bisect(ident: &str) -> &str { + static USE_RAW: [(&str, &str); 47] = [ + ("abstract", "r#abstract"), + ("as", "r#as"), + ("async", "r#async"), + ("await", "r#await"), + ("become", "r#become"), + ("box", "r#box"), + ("break", "r#break"), + ("const", "r#const"), + ("continue", "r#continue"), + ("crate", "r#crate"), + ("do", "r#do"), + ("dyn", "r#dyn"), + ("else", "r#else"), + ("enum", "r#enum"), + ("extern", "r#extern"), + ("false", "r#false"), + ("final", "r#final"), + ("fn", "r#fn"), + ("for", "r#for"), + ("if", "r#if"), + ("impl", "r#impl"), + ("in", "r#in"), + ("let", "r#let"), + ("macro", "r#macro"), + ("match", "r#match"), + ("mod", "r#mod"), + ("move", "r#move"), + ("mut", "r#mut"), + ("override", "r#override"), + ("priv", "r#priv"), + ("pub", "r#pub"), + ("ref", "r#ref"), + ("return", "r#return"), + ("static", "r#static"), + ("struct", "r#struct"), + ("trait", "r#trait"), + ("true", "r#true"), + ("try", "r#try"), + ("type", "r#type"), + ("typeof", "r#typeof"), + ("unsafe", "r#unsafe"), + ("unsized", "r#unsized"), + ("use", "r#use"), + ("virtual", "r#virtual"), + ("where", "r#where"), + ("while", "r#while"), + ("yield", "r#yield"), + ]; + + if let Ok(idx) = USE_RAW.binary_search_by(|(probe, _)| (*probe).cmp(ident)) { + USE_RAW[idx].1 + } else { + ident + } +} + +fn normalize_identifier_linear_replacement_only(ident: &str) -> &str { + static USE_RAW: [&str; 47] = [ + "r#abstract", + "r#as", + "r#async", + "r#await", + "r#become", + "r#box", + "r#break", + "r#const", + "r#continue", + "r#crate", + "r#do", + "r#dyn", + "r#else", + "r#enum", + "r#extern", + "r#false", + "r#final", + "r#fn", + "r#for", + "r#if", + "r#impl", + "r#in", + "r#let", + "r#macro", + "r#match", + "r#mod", + "r#move", + "r#mut", + "r#override", + "r#priv", + "r#pub", + "r#ref", + "r#return", + "r#static", + "r#struct", + "r#trait", + "r#true", + "r#try", + "r#type", + "r#typeof", + "r#unsafe", + "r#unsized", + "r#use", + "r#virtual", + "r#where", + "r#while", + "r#yield", + ]; + + USE_RAW + .iter() + .find(|x| &x[2..] == ident) + .copied() + .unwrap_or(ident) +} + +fn normalize_identifier_bisect_replacement_only(ident: &str) -> &str { + static USE_RAW: [&str; 47] = [ + "r#abstract", + "r#as", + "r#async", + "r#await", + "r#become", + "r#box", + "r#break", + "r#const", + "r#continue", + "r#crate", + "r#do", + "r#dyn", + "r#else", + "r#enum", + "r#extern", + "r#false", + "r#final", + "r#fn", + "r#for", + "r#if", + "r#impl", + "r#in", + "r#let", + "r#macro", + "r#match", + "r#mod", + "r#move", + "r#mut", + "r#override", + "r#priv", + "r#pub", + "r#ref", + "r#return", + "r#static", + "r#struct", + "r#trait", + "r#true", + "r#try", + "r#type", + "r#typeof", + "r#unsafe", + "r#unsized", + "r#use", + "r#virtual", + "r#where", + "r#while", + "r#yield", + ]; + + if let Ok(idx) = USE_RAW.binary_search_by(|probe| probe[2..].cmp(ident)) { + USE_RAW[idx] + } else { + ident + } +} + +fn normalize_identifier_linear_by_len(ident: &str) -> &str { + const KW0: &[([u8; 8], [u8; 10])] = &[]; + const KW1: &[([u8; 8], [u8; 10])] = &[]; + const KW2: &[([u8; 8], [u8; 10])] = &[ + (*b"as______", *b"r#as______"), + (*b"do______", *b"r#do______"), + (*b"fn______", *b"r#fn______"), + (*b"if______", *b"r#if______"), + (*b"in______", *b"r#in______"), + ]; + const KW3: &[([u8; 8], [u8; 10])] = &[ + (*b"box_____", *b"r#box_____"), + (*b"dyn_____", *b"r#dyn_____"), + (*b"for_____", *b"r#for_____"), + (*b"let_____", *b"r#let_____"), + (*b"mod_____", *b"r#mod_____"), + (*b"mut_____", *b"r#mut_____"), + (*b"pub_____", *b"r#pub_____"), + (*b"ref_____", *b"r#ref_____"), + (*b"try_____", *b"r#try_____"), + (*b"use_____", *b"r#use_____"), + ]; + const KW4: &[([u8; 8], [u8; 10])] = &[ + (*b"else____", *b"r#else____"), + (*b"enum____", *b"r#enum____"), + (*b"impl____", *b"r#impl____"), + (*b"move____", *b"r#move____"), + (*b"priv____", *b"r#priv____"), + (*b"true____", *b"r#true____"), + (*b"type____", *b"r#type____"), + ]; + const KW5: &[([u8; 8], [u8; 10])] = &[ + (*b"async___", *b"r#async___"), + (*b"await___", *b"r#await___"), + (*b"break___", *b"r#break___"), + (*b"const___", *b"r#const___"), + (*b"crate___", *b"r#crate___"), + (*b"false___", *b"r#false___"), + (*b"final___", *b"r#final___"), + (*b"macro___", *b"r#macro___"), + (*b"match___", *b"r#match___"), + (*b"trait___", *b"r#trait___"), + (*b"where___", *b"r#where___"), + (*b"while___", *b"r#while___"), + (*b"yield___", *b"r#yield___"), + ]; + const KW6: &[([u8; 8], [u8; 10])] = &[ + (*b"become__", *b"r#become__"), + (*b"extern__", *b"r#extern__"), + (*b"return__", *b"r#return__"), + (*b"static__", *b"r#static__"), + (*b"struct__", *b"r#struct__"), + (*b"typeof__", *b"r#typeof__"), + (*b"unsafe__", *b"r#unsafe__"), + ]; + const KW7: &[([u8; 8], [u8; 10])] = &[ + (*b"unsized_", *b"r#unsized_"), + (*b"virtual_", *b"r#virtual_"), + ]; + const KW8: &[([u8; 8], [u8; 10])] = &[ + (*b"abstract", *b"r#abstract"), + (*b"continue", *b"r#continue"), + (*b"override", *b"r#override"), + ]; + const KWS: &[&[([u8; 8], [u8; 10])]] = &[KW0, KW1, KW2, KW3, KW4, KW5, KW6, KW7, KW8]; + + if ident.len() > 8 { + return ident; + } + let kws = KWS[ident.len()]; + + let mut padded_ident = [b'_'; 8]; + padded_ident[..ident.len()].copy_from_slice(ident.as_bytes()); + + let replacement = match kws.iter().find(|(kw, _)| *kw == padded_ident) { + Some((_, replacement)) => replacement, + None => return ident, + }; + + // SAFETY: We know that the input byte slice is pure-ASCII. + unsafe { std::str::from_utf8_unchecked(&replacement[..ident.len() + 2]) } +} + +fn normalize_identifier_linear_by_len_replacement_only(ident: &str) -> &str { + const KW0: &[[u8; 10]] = &[]; + const KW1: &[[u8; 10]] = &[]; + const KW2: &[[u8; 10]] = &[ + *b"r#as______", + *b"r#do______", + *b"r#fn______", + *b"r#if______", + *b"r#in______", + ]; + const KW3: &[[u8; 10]] = &[ + *b"r#box_____", + *b"r#dyn_____", + *b"r#for_____", + *b"r#let_____", + *b"r#mod_____", + *b"r#mut_____", + *b"r#pub_____", + *b"r#ref_____", + *b"r#try_____", + *b"r#use_____", + ]; + const KW4: &[[u8; 10]] = &[ + *b"r#else____", + *b"r#enum____", + *b"r#impl____", + *b"r#move____", + *b"r#priv____", + *b"r#true____", + *b"r#type____", + ]; + const KW5: &[[u8; 10]] = &[ + *b"r#async___", + *b"r#await___", + *b"r#break___", + *b"r#const___", + *b"r#crate___", + *b"r#false___", + *b"r#final___", + *b"r#macro___", + *b"r#match___", + *b"r#trait___", + *b"r#where___", + *b"r#while___", + *b"r#yield___", + ]; + const KW6: &[[u8; 10]] = &[ + *b"r#become__", + *b"r#extern__", + *b"r#return__", + *b"r#static__", + *b"r#struct__", + *b"r#typeof__", + *b"r#unsafe__", + ]; + const KW7: &[[u8; 10]] = &[*b"r#unsized_", *b"r#virtual_"]; + const KW8: &[[u8; 10]] = &[*b"r#abstract", *b"r#continue", *b"r#override"]; + const KWS: &[&[[u8; 10]]] = &[KW0, KW1, KW2, KW3, KW4, KW5, KW6, KW7, KW8]; + + if ident.len() > 8 { + return ident; + } + let kws = KWS[ident.len()]; + + let mut padded_ident = [b'_'; 8]; + padded_ident[..ident.len()].copy_from_slice(ident.as_bytes()); + + let replacement = match kws + .iter() + .find(|probe| padded_ident == <[u8; 8]>::try_from(&probe[2..]).unwrap()) + { + Some(replacement) => replacement, + None => return ident, + }; + + // SAFETY: We know that the input byte slice is pure-ASCII. + unsafe { std::str::from_utf8_unchecked(&replacement[..ident.len() + 2]) } +} + +fn normalize_identifier_bisect_by_len(ident: &str) -> &str { + const KW0: &[([u8; 8], [u8; 10])] = &[]; + const KW1: &[([u8; 8], [u8; 10])] = &[]; + const KW2: &[([u8; 8], [u8; 10])] = &[ + (*b"as______", *b"r#as______"), + (*b"do______", *b"r#do______"), + (*b"fn______", *b"r#fn______"), + (*b"if______", *b"r#if______"), + (*b"in______", *b"r#in______"), + ]; + const KW3: &[([u8; 8], [u8; 10])] = &[ + (*b"box_____", *b"r#box_____"), + (*b"dyn_____", *b"r#dyn_____"), + (*b"for_____", *b"r#for_____"), + (*b"let_____", *b"r#let_____"), + (*b"mod_____", *b"r#mod_____"), + (*b"mut_____", *b"r#mut_____"), + (*b"pub_____", *b"r#pub_____"), + (*b"ref_____", *b"r#ref_____"), + (*b"try_____", *b"r#try_____"), + (*b"use_____", *b"r#use_____"), + ]; + const KW4: &[([u8; 8], [u8; 10])] = &[ + (*b"else____", *b"r#else____"), + (*b"enum____", *b"r#enum____"), + (*b"impl____", *b"r#impl____"), + (*b"move____", *b"r#move____"), + (*b"priv____", *b"r#priv____"), + (*b"true____", *b"r#true____"), + (*b"type____", *b"r#type____"), + ]; + const KW5: &[([u8; 8], [u8; 10])] = &[ + (*b"async___", *b"r#async___"), + (*b"await___", *b"r#await___"), + (*b"break___", *b"r#break___"), + (*b"const___", *b"r#const___"), + (*b"crate___", *b"r#crate___"), + (*b"false___", *b"r#false___"), + (*b"final___", *b"r#final___"), + (*b"macro___", *b"r#macro___"), + (*b"match___", *b"r#match___"), + (*b"trait___", *b"r#trait___"), + (*b"where___", *b"r#where___"), + (*b"while___", *b"r#while___"), + (*b"yield___", *b"r#yield___"), + ]; + const KW6: &[([u8; 8], [u8; 10])] = &[ + (*b"become__", *b"r#become__"), + (*b"extern__", *b"r#extern__"), + (*b"return__", *b"r#return__"), + (*b"static__", *b"r#static__"), + (*b"struct__", *b"r#struct__"), + (*b"typeof__", *b"r#typeof__"), + (*b"unsafe__", *b"r#unsafe__"), + ]; + const KW7: &[([u8; 8], [u8; 10])] = &[ + (*b"unsized_", *b"r#unsized_"), + (*b"virtual_", *b"r#virtual_"), + ]; + const KW8: &[([u8; 8], [u8; 10])] = &[ + (*b"abstract", *b"r#abstract"), + (*b"continue", *b"r#continue"), + (*b"override", *b"r#override"), + ]; + const KWS: &[&[([u8; 8], [u8; 10])]] = &[KW0, KW1, KW2, KW3, KW4, KW5, KW6, KW7, KW8]; + + if ident.len() > 8 { + return ident; + } + let kws = KWS[ident.len()]; + + let mut padded_ident = [b'_'; 8]; + padded_ident[..ident.len()].copy_from_slice(ident.as_bytes()); + + if let Ok(idx) = kws.binary_search_by(|(probe, _)| probe.cmp(&padded_ident)) { + // SAFETY: We know that the input byte slice is pure-ASCII. + unsafe { std::str::from_utf8_unchecked(&kws[idx].1[..ident.len() + 2]) } + } else { + ident + } +} + +fn normalize_identifier_bisect_by_len_replacement_only(ident: &str) -> &str { + const KW0: &[[u8; 10]] = &[]; + const KW1: &[[u8; 10]] = &[]; + const KW2: &[[u8; 10]] = &[ + *b"r#as______", + *b"r#do______", + *b"r#fn______", + *b"r#if______", + *b"r#in______", + ]; + const KW3: &[[u8; 10]] = &[ + *b"r#box_____", + *b"r#dyn_____", + *b"r#for_____", + *b"r#let_____", + *b"r#mod_____", + *b"r#mut_____", + *b"r#pub_____", + *b"r#ref_____", + *b"r#try_____", + *b"r#use_____", + ]; + const KW4: &[[u8; 10]] = &[ + *b"r#else____", + *b"r#enum____", + *b"r#impl____", + *b"r#move____", + *b"r#priv____", + *b"r#true____", + *b"r#type____", + ]; + const KW5: &[[u8; 10]] = &[ + *b"r#async___", + *b"r#await___", + *b"r#break___", + *b"r#const___", + *b"r#crate___", + *b"r#false___", + *b"r#final___", + *b"r#macro___", + *b"r#match___", + *b"r#trait___", + *b"r#where___", + *b"r#while___", + *b"r#yield___", + ]; + const KW6: &[[u8; 10]] = &[ + *b"r#become__", + *b"r#extern__", + *b"r#return__", + *b"r#static__", + *b"r#struct__", + *b"r#typeof__", + *b"r#unsafe__", + ]; + const KW7: &[[u8; 10]] = &[*b"r#unsized_", *b"r#virtual_"]; + const KW8: &[[u8; 10]] = &[*b"r#abstract", *b"r#continue", *b"r#override"]; + const KWS: &[&[[u8; 10]]] = &[KW0, KW1, KW2, KW3, KW4, KW5, KW6, KW7, KW8]; + + if ident.len() > 8 { + return ident; + } + let kws = KWS[ident.len()]; + + let mut padded_ident = [b'_'; 8]; + padded_ident[..ident.len()].copy_from_slice(ident.as_bytes()); + + let idx = + kws.binary_search_by(|probe| <[u8; 8]>::try_from(&probe[2..]).unwrap().cmp(&padded_ident)); + match idx { + Ok(idx) => unsafe { std::str::from_utf8_unchecked(&kws[idx][..ident.len() + 2]) }, + Err(_) => ident, + } +} + +fn normalize_identifier_phf(ident: &str) -> &str { + static USE_RAW: phf::Map<&str, &str> = phf::phf_map! { + "abstract" => "r#abstract", + "as" => "r#as", + "async" => "r#async", + "await" => "r#await", + "become" => "r#become", + "box" => "r#box", + "break" => "r#break", + "const" => "r#const", + "continue" => "r#continue", + "crate" => "r#crate", + "do" => "r#do", + "dyn" => "r#dyn", + "else" => "r#else", + "enum" => "r#enum", + "extern" => "r#extern", + "false" => "r#false", + "final" => "r#final", + "fn" => "r#fn", + "for" => "r#for", + "if" => "r#if", + "impl" => "r#impl", + "in" => "r#in", + "let" => "r#let", + "macro" => "r#macro", + "match" => "r#match", + "mod" => "r#mod", + "move" => "r#move", + "mut" => "r#mut", + "override" => "r#override", + "priv" => "r#priv", + "pub" => "r#pub", + "ref" => "r#ref", + "return" => "r#return", + "static" => "r#static", + "struct" => "r#struct", + "trait" => "r#trait", + "true" => "r#true", + "try" => "r#try", + "type" => "r#type", + "typeof" => "r#typeof", + "unsafe" => "r#unsafe", + "unsized" => "r#unsized", + "use" => "r#use", + "virtual" => "r#virtual", + "where" => "r#where", + "while" => "r#while", + "yield" => "r#yield", + }; + + USE_RAW.get(ident).copied().unwrap_or(ident) +} + +struct Words(&'static str); + +impl Default for Words { + fn default() -> Self { + Self(include_str!("../../askama_derive/src/generator.rs")) + } +} + +impl Iterator for Words { + type Item = &'static str; + + fn next(&mut self) -> Option<Self::Item> { + let mut pos = self.0; + loop { + if pos.is_empty() { + self.0 = ""; + return None; + } else if matches!(pos.as_bytes()[0], b'_' | b'a'..=b'z' | b'A'..=b'Z') { + break; + } + + let mut chars = pos.chars(); + chars.next(); + pos = chars.as_str(); + } + + let start = pos; + loop { + if pos.is_empty() { + self.0 = ""; + return Some(start); + } else if !matches!(pos.as_bytes()[0], b'_' | b'a'..=b'z' | b'A'..=b'Z' | b'0'..=b'9') { + self.0 = pos; + return Some(&start[..start.len() - pos.len()]); + } + + let mut chars = pos.chars(); + chars.next(); + pos = chars.as_str(); + } + } +} + +impl FusedIterator for Words {} |