kmath-ast/build.gradle.kts

@@ -5,17 +5,13 @@ plugins {
 kotlin.js {
     nodejs { // or `browser`
         testTask {
-            useMocha {
-                timeout = "0"// mochaTimeout here as string
-            }
+            useMocha().timeout = "0"
         }
     }
 
-    browser { // or `browser`
+    browser {
         testTask {
-            useMocha {
-                timeout = "0"// mochaTimeout here as string
-            }
+            useMocha().timeout = "0"
         }
     }
 }
@@ -37,7 +33,7 @@ kotlin.sourceSets {
 
     jsMain {
         dependencies {
-            implementation(npm("binaryen", "98.0.0"))
+            implementation(npm("binaryen", "98.0.0-nightly.20201113"))
             implementation(npm("js-base64", "3.6.0"))
             implementation(npm("webassembly", "0.11.0"))
         }

kmath-ast/src/jsMain/kotlin/kscience/kmath/ast/RealWasmBuilder.kt

@@ -11,7 +11,11 @@ import binaryen.Module as BinaryenModule
 private val spreader = eval("(obj, args) => obj(...args)")
 
 @Suppress("UnsafeCastFromDynamic")
-internal sealed class WasmBuilder<T>(val binaryenType: Type, val kmathAlgebra: Algebra<T>) where T : Number {
+internal sealed class WasmBuilder<T>(
+    val binaryenType: Type,
+    val kmathAlgebra: Algebra<T>,
+    val target: MST
+) where T : Number {
     val keys: MutableList<String> = mutableListOf()
     lateinit var ctx: BinaryenModule
 
@@ -49,10 +53,10 @@ internal sealed class WasmBuilder<T>(val binaryenType: Type, val kmathAlgebra: A
         is MST.Binary -> visitBinary(mst)
     }
 
-    fun compile(mst: MST): Expression<T> {
-        val bin = with(createModule()) {
+    val instance by lazy {
+        val c = WasmModule(with(createModule()) {
             ctx = this
-            val expr = visit(mst)
+            val expr = visit(target)
 
             addFunction(
                 "executable",
@@ -68,20 +72,20 @@ internal sealed class WasmBuilder<T>(val binaryenType: Type, val kmathAlgebra: A
             val res = emitBinary()
             dispose()
             res
-        }
+        })
 
-        val c = WasmModule(bin)
         val i = Instance(c, js("{}") as Any)
+        val symbols = keys.map(::StringSymbol)
+        keys.clear()
 
-        return Expression { args ->
-            val params = keys.map(::StringSymbol).map(args::getValue).toTypedArray()
-            keys.clear()
+        Expression<T> { args ->
+            val params = symbols.map(args::getValue).toTypedArray()
             spreader(i.exports.asDynamic().executable, params) as T
         }
     }
 }
 
-internal class RealWasmBuilder : WasmBuilder<Double>(f64, RealField) {
+internal class RealWasmBuilder(target: MST) : WasmBuilder<Double>(f64, RealField, target) {
     override fun createModule(): BinaryenModule = readBinary(f64StandardFunctions)
 
     override fun visitNumeric(mst: MST.Numeric): ExpressionRef = ctx.f64.const(mst.value)
@@ -117,7 +121,7 @@ internal class RealWasmBuilder : WasmBuilder<Double>(f64, RealField) {
     }
 }
 
-internal class IntWasmBuilder : WasmBuilder<Int>(i32, IntRing) {
+internal class IntWasmBuilder(target: MST) : WasmBuilder<Int>(i32, IntRing, target) {
     override fun visitNumeric(mst: MST.Numeric): ExpressionRef = ctx.i32.const(mst.value)
 
     override fun visitUnary(mst: MST.Unary): ExpressionRef = when (mst.operation) {

kmath-ast/src/jsTest/kotlin/Test.kt

@@ -1,28 +1,61 @@
 package kscience.kmath.ast
 
 import kscience.kmath.expressions.invoke
+import kscience.kmath.operations.RealField
 import kscience.kmath.operations.invoke
+import kotlin.random.Random
 import kotlin.test.Test
 import kotlin.test.assertEquals
+import kotlin.time.measureTime
 
 internal class Test {
     @Test
     fun int() {
-        val res = IntWasmBuilder().compile(MstRing { number(100000000) + number(10000000) })()
+        val res = IntWasmBuilder(MstRing { number(100000000) + number(10000000) }).instance()
         assertEquals(110000000, res)
     }
 
     @Test
     fun real() {
-        val res = RealWasmBuilder().compile(MstExtendedField { number(100000000) + number(2).pow(10) })()
+        val res = RealWasmBuilder(MstExtendedField { number(100000000) + number(2).pow(10) }).instance()
         assertEquals(100001024.0, res)
     }
 
     @Test
     fun argsPassing() {
-        val res = RealWasmBuilder()
-            .compile(MstExtendedField { symbol("y") + symbol("x").pow(10) })("x" to 2.0, "y" to 100000000.0)
+        val res = RealWasmBuilder(MstExtendedField { symbol("y") + symbol("x").pow(10) })
+            .instance("x" to 2.0, "y" to 100000000.0)
 
         assertEquals(100001024.0, res)
     }
+
+    @Test
+    fun powFunction() {
+        val expr = RealWasmBuilder(MstExtendedField { symbol("x").pow(1.0 / 6.0) }).instance
+        assertEquals(0.9730585187140817, expr("x" to 0.8488554755054833))
+    }
+
+    @Test
+    fun manyRuns() {
+        println("Compiled")
+        val times = 1_000_000
+        var rng = Random(0)
+        var sum1 = 0.0
+        var sum2 = 0.0
+
+        measureTime {
+            val res = RealWasmBuilder(MstExtendedField { symbol("x").pow(1.0 / 6.0) }).instance
+            repeat(times) { sum1 += res("x" to rng.nextDouble()) }
+        }.also(::println)
+
+        println("MST")
+        rng = Random(0)
+
+        measureTime {
+            val res = RealField.mstInExtendedField { symbol("x").pow(1.0 / 6.0) }
+            repeat(times) { sum2 += res("x" to rng.nextDouble()) }
+        }.also(::println)
+
+        assertEquals(sum1, sum2)
+    }
 }

kmath-core/src/commonMain/kotlin/kscience/kmath/operations/Algebra.kt

@@ -49,7 +49,7 @@ public interface NumericAlgebra<T> : Algebra<T> {
      * Dynamic call of binary operation [operation] on [left] and [right] where right element is [Number].
      */
     public fun rightSideNumberOperation(operation: String, left: T, right: Number): T =
-        leftSideNumberOperation(operation, right, left)
+        binaryOperation(operation, left, number(right))
 }
 
 /**