pub fn parse<T: AsRef<str>>(formula: T) -> Result<ASTNode, ParserError>Examples found in repository?
examples/parser_guard_bench.rs (line 152)
148fn semantic_digest(formulas: &[String]) -> u64 {
149 // Outside timing; include every source, not only a first representative.
150 let mut h = 0xcbf2_9ce4_8422_2325_u64;
151 for formula in formulas {
152 let ast = parse(formula).unwrap_or_else(|e| panic!("{formula}: {e}"));
153 h ^= ast.fingerprint();
154 h = h.wrapping_mul(0x100_0000_01b3);
155 }
156 h
157}
158
159fn consume(ast: ASTNode) {
160 black_box(&ast);
161 drop(ast);
162}
163
164fn main() {
165 println!("workload,iterations,sources,elapsed_ns,ns_per_parse,digest");
166 for c in corpus() {
167 let digest = semantic_digest(&c.formulas);
168 let builder = BatchParser::builder();
169 let builder = if let Ok(entries) = std::env::var("BENCH_CACHE_ENTRIES") {
170 builder.cache_capacity(entries.parse().unwrap(), usize::MAX)
171 } else {
172 builder
173 };
174 let mut batch = builder.build();
175 // Warm allocator, code and the full working set. Pre-existing token
176 // cache warmup is retained intentionally to reveal eviction thrashing.
177 let unique = c.name == "batch_unique_stream";
178 let warm_count = if unique {
179 4096
180 } else {
181 c.formulas.len().max(4096)
182 };
183 for i in 0..warm_count {
184 let other = unique.then(|| format!("=X{i}+Y{i}*$C$1"));
185 let f = other
186 .as_deref()
187 .unwrap_or(&c.formulas[i % c.formulas.len()]);
188 consume(if c.batch {
189 batch.parse(f).unwrap()
190 } else {
191 parse(f).unwrap()
192 });
193 }
194 let start = Instant::now();
195 for i in 0..c.iterations {
196 let f = black_box(&c.formulas[i % c.formulas.len()]);
197 consume(if c.batch {
198 batch.parse(f).unwrap()
199 } else {
200 parse(f).unwrap()
201 });
202 }
203 let elapsed = start.elapsed().as_nanos();
204 println!(
205 "{},{},{},{},{:.3},{:016x}",
206 c.name,
207 c.iterations,
208 c.formulas.len(),
209 elapsed,
210 elapsed as f64 / c.iterations as f64,
211 digest
212 );
213 }
214}