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92f105dbe1
note: This is due to constant folding by the JIT. For `String#includes` on dynamic strings, the performance improvement is not this significant. **before:** ``` $ bun ./bench/snippets/string-includes.mjs cpu: Apple M4 Max runtime: bun 1.3.5 (arm64-darwin) benchmark time (avg) (min … max) p75 p99 p999 ----------------------------------------------------------------------------- ----------------------------- String.includes - short, hit (middle) 82.24 ns/iter (14.95 ns … 881 ns) 84.98 ns 470 ns 791 ns String.includes - short, hit (start) 37.44 ns/iter (8.46 ns … 774 ns) 26.08 ns 379 ns 598 ns String.includes - short, hit (end) 97.27 ns/iter (16.93 ns … 823 ns) 107 ns 537 ns 801 ns String.includes - short, miss 102 ns/iter (0 ps … 1'598 µs) 42 ns 125 ns 167 ns String.includes - long, hit (middle) 16.01 ns/iter (14.34 ns … 115 ns) 16.03 ns 20.1 ns 53.1 ns String.includes - long, miss 945 ns/iter (935 ns … 972 ns) 948 ns 960 ns 972 ns String.includes - with position 9.83 ns/iter (8.44 ns … 58.45 ns) 9.83 ns 12.31 ns 15.69 ns ``` **after:** ``` $ ./build/release/bun bench/snippets/string-includes.mjs cpu: Apple M4 Max runtime: bun 1.3.6 (arm64-darwin) benchmark time (avg) (min … max) p75 p99 p999 ----------------------------------------------------------------------------- ----------------------------- String.includes - short, hit (middle) 243 ps/iter (203 ps … 10.13 ns) 244 ps 325 ps 509 ps ! String.includes - short, hit (start) 374 ps/iter (244 ps … 19.78 ns) 387 ps 488 ps 691 ps String.includes - short, hit (end) 708 ps/iter (407 ps … 18.03 ns) 651 ps 2.62 ns 2.69 ns String.includes - short, miss 1.49 ns/iter (407 ps … 27.93 ns) 2.87 ns 3.09 ns 3.78 ns String.includes - long, hit (middle) 3.28 ns/iter (3.05 ns … 118 ns) 3.15 ns 8.75 ns 16.07 ns String.includes - long, miss 7.28 ns/iter (3.44 ns … 698 ns) 9.34 ns 42.85 ns 240 ns String.includes - with position 7.97 ns/iter (3.7 ns … 602 ns) 9.68 ns 52.19 ns 286 ns ```
35 lines
804 B
JavaScript
35 lines
804 B
JavaScript
import { bench, run } from "../runner.mjs";
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const shortStr = "The quick brown fox jumps over the lazy dog";
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const longStr = shortStr.repeat(100);
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bench("String.includes - short, hit (middle)", () => {
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return shortStr.includes("jumps");
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});
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bench("String.includes - short, hit (start)", () => {
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return shortStr.includes("The");
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});
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bench("String.includes - short, hit (end)", () => {
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return shortStr.includes("dog");
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});
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bench("String.includes - short, miss", () => {
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return shortStr.includes("cat");
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});
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bench("String.includes - long, hit (middle)", () => {
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return longStr.includes("jumps");
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});
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bench("String.includes - long, miss", () => {
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return longStr.includes("cat");
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});
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bench("String.includes - with position", () => {
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return shortStr.includes("fox", 10);
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});
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await run();
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