Optimize conditionals in ParallelFormatBenchmark by replacing modulus checks with bitwise operations

DmitryNekrasov · DmitryNekrasov · commit a32c6656e307 · 2025-11-10T20:12:19.000+04:00
diff --git a/benchmarks/src/jmh/kotlin/ParallelFormatBenchmark.kt b/benchmarks/src/jmh/kotlin/ParallelFormatBenchmark.kt
@@ -52,7 +52,7 @@ open class ParallelFormatBenchmark {
                     primaryFormat = { year(); char('-'); monthNumber(); char('-'); day() }
                 )
 
-                if (index % 2 == 0) {
+                if (index and 1 == 0) {
                     alternativeParsing(
                         {
                             alternativeParsing(
@@ -74,7 +74,7 @@ open class ParallelFormatBenchmark {
                     char('|')
                 }
 
-                if (index < 8) {
+                if (index and 2 == 0) {
                     alternativeParsing(
                         { char('Z') },
                         { char('+'); hour(); char(':'); minute() },

Original file line number	Diff line number	Diff line change
`@@ -52,7 +52,7 @@ open class ParallelFormatBenchmark {`
`52`	`52`	`primaryFormat = { year(); char('-'); monthNumber(); char('-'); day() }`
`53`	`53`	`)`
`54`	`54`
`55`		`- if (index % 2 == 0) {`
	`55`	`+ if (index and 1 == 0) {`
`56`	`56`	`alternativeParsing(`
`57`	`57`	`{`
`58`	`58`	`alternativeParsing(`
`@@ -74,7 +74,7 @@ open class ParallelFormatBenchmark {`
`74`	`74`	`char('\|')`
`75`	`75`	`}`
`76`	`76`
`77`		`- if (index < 8) {`
	`77`	`+ if (index and 2 == 0) {`
`78`	`78`	`alternativeParsing(`
`79`	`79`	`{ char('Z') },`
`80`	`80`	`{ char('+'); hour(); char(':'); minute() },`