pub fn parse<T: AsRef<str>>(formula: T) -> Result<ASTNode, ParserError>Examples found in repository?
examples/parser_guard_bench.rs (line 141)
137fn semantic_digest(formulas: &[String]) -> u64 {
138 // Outside timing; include every source, not only a first representative.
139 let mut h = 0xcbf2_9ce4_8422_2325_u64;
140 for formula in formulas {
141 let ast = parse(formula).unwrap_or_else(|e| panic!("{formula}: {e}"));
142 h ^= ast.fingerprint();
143 h = h.wrapping_mul(0x100_0000_01b3);
144 }
145 h
146}
147
148fn consume(ast: ASTNode) {
149 black_box(&ast);
150 drop(ast);
151}
152
153fn main() {
154 println!("workload,iterations,sources,elapsed_ns,ns_per_parse,digest");
155 for c in corpus() {
156 let digest = semantic_digest(&c.formulas);
157 let builder = BatchParser::builder();
158 let builder = if let Ok(entries) = std::env::var("BENCH_CACHE_ENTRIES") {
159 builder.cache_capacity(entries.parse().unwrap(), usize::MAX)
160 } else {
161 builder
162 };
163 let mut batch = builder.build();
164 // Warm allocator, code and the full working set. Pre-existing token
165 // cache warmup is retained intentionally to reveal eviction thrashing.
166 let unique = c.name == "batch_unique_stream";
167 let warm_count = if unique {
168 4096
169 } else {
170 c.formulas.len().max(4096)
171 };
172 for i in 0..warm_count {
173 let other = unique.then(|| format!("=X{i}+Y{i}*$C$1"));
174 let f = other
175 .as_deref()
176 .unwrap_or(&c.formulas[i % c.formulas.len()]);
177 consume(if c.batch {
178 batch.parse(f).unwrap()
179 } else {
180 parse(f).unwrap()
181 });
182 }
183 let start = Instant::now();
184 for i in 0..c.iterations {
185 let f = black_box(&c.formulas[i % c.formulas.len()]);
186 consume(if c.batch {
187 batch.parse(f).unwrap()
188 } else {
189 parse(f).unwrap()
190 });
191 }
192 let elapsed = start.elapsed().as_nanos();
193 println!(
194 "{},{},{},{},{:.3},{:016x}",
195 c.name,
196 c.iterations,
197 c.formulas.len(),
198 elapsed,
199 elapsed as f64 / c.iterations as f64,
200 digest
201 );
202 }
203}