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Replace usages of j.u.Stack with fastutil's

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Java's is synchronized everywhere, reducing performance given we don't need it to be. It's recommended to use `Deque` as a replacement, but given we have fastutil's, we use those

Closes #1640
This commit is contained in:
altrisi committed 2023-01-24 13:46:53 +01:00
1 parent fb7b1f79a5
commit 889e3b6999
1 file changed
+21 -19
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src/main/java/carpet/script/Expression.java
+21 -19
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@@ -32,7 +32,10 @@ import carpet.script.value.FunctionValue;
import carpet.script.value.NumericValue;
import carpet.script.value.StringValue;
import carpet.script.value.Value;
import it.unimi.dsi.fastutil.Stack;
import it.unimi.dsi.fastutil.ints.IntArrayList;
import it.unimi.dsi.fastutil.objects.Object2ObjectOpenHashMap;
import it.unimi.dsi.fastutil.objects.ObjectArrayList;
import java.math.BigInteger;
import java.util.ArrayList;
@@ -41,7 +44,6 @@ import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.Stack;
import java.util.function.BiFunction;
import java.util.function.Function;
import java.util.function.Supplier;
@@ -763,7 +765,7 @@ public class Expression
private List<Tokenizer.Token> shuntingYard(Context c)
{
List<Tokenizer.Token> outputQueue = new ArrayList<>();
Stack<Tokenizer.Token> stack = new Stack<>();
Stack<Tokenizer.Token> stack = new ObjectArrayList<>();
Tokenizer tokenizer = new Tokenizer(c, this, expression, allowComments, allowNewlineSubstitutions);
// stripping lousy but acceptable semicolons
@@ -801,7 +803,7 @@ public class Expression
{
throw new ExpressionException(c, this, previousToken, "Missing parameter(s) for operator ");
}
while (!stack.isEmpty() && stack.peek().type != Tokenizer.Token.TokenType.OPEN_PAREN)
while (!stack.isEmpty() && stack.top().type != Tokenizer.Token.TokenType.OPEN_PAREN)
{
outputQueue.add(stack.pop());
}
@@ -878,7 +880,7 @@ public class Expression
{
throw new ExpressionException(c, this, previousToken, "Missing parameter(s) for operator " + previousToken);
}
while (!stack.isEmpty() && stack.peek().type != Tokenizer.Token.TokenType.OPEN_PAREN)
while (!stack.isEmpty() && stack.top().type != Tokenizer.Token.TokenType.OPEN_PAREN)
{
outputQueue.add(stack.pop());
}
@@ -887,7 +889,7 @@ public class Expression
throw new ExpressionException(c, this, "Mismatched parentheses");
}
stack.pop();
if (!stack.isEmpty() && stack.peek().type == Tokenizer.Token.TokenType.FUNCTION)
if (!stack.isEmpty() && stack.top().type == Tokenizer.Token.TokenType.FUNCTION)
{
outputQueue.add(stack.pop());
}
@@ -918,7 +920,7 @@ public class Expression
private void shuntOperators(List<Tokenizer.Token> outputQueue, Stack<Tokenizer.Token> stack, ILazyOperator o1)
{
Tokenizer.Token nextToken = stack.isEmpty() ? null : stack.peek();
Tokenizer.Token nextToken = stack.isEmpty() ? null : stack.top();
while (nextToken != null
&& (nextToken.type == Tokenizer.Token.TokenType.OPERATOR
|| nextToken.type == Tokenizer.Token.TokenType.UNARY_OPERATOR)
@@ -926,7 +928,7 @@ public class Expression
|| (o1.getPrecedence() < operators.get(nextToken.surface).getPrecedence())))
{
outputQueue.add(stack.pop());
nextToken = stack.isEmpty() ? null : stack.peek();
nextToken = stack.isEmpty() ? null : stack.top();
}
}
@@ -995,7 +997,7 @@ public class Expression
private ExpressionNode RPNToParseTree(List<Tokenizer.Token> tokens, Context context)
{
Stack<ExpressionNode> nodeStack = new Stack<>();
Stack<ExpressionNode> nodeStack = new ObjectArrayList<>();
for (final Tokenizer.Token token : tokens)
{
switch (token.type)
@@ -1041,7 +1043,7 @@ public class Expression
}
// pop parameters off the stack until we hit the start of
// this function's parameter list
while (!nodeStack.isEmpty() && nodeStack.peek() != ExpressionNode.PARAMS_START)
while (!nodeStack.isEmpty() && nodeStack.top() != ExpressionNode.PARAMS_START)
{
p.add(nodeStack.pop());
}
@@ -1052,7 +1054,7 @@ public class Expression
}
Collections.reverse(p);
if (nodeStack.peek() == ExpressionNode.PARAMS_START)
if (nodeStack.top() == ExpressionNode.PARAMS_START)
{
nodeStack.pop();
};
@@ -1377,7 +1379,7 @@ public class Expression
// each
// layer on the stack being the count of the number of parameters in
// that scope
Stack<Integer> stack = new Stack<>();
IntArrayList stack = new IntArrayList(); // IntArrayList instead of just IntStack because we need to query the size
// push the 'global' scope
stack.push(0);
@@ -1387,13 +1389,13 @@ public class Expression
switch (token.type)
{
case UNARY_OPERATOR:
if (stack.peek() < 1)
if (stack.topInt() < 1)
{
throw new ExpressionException(c, this, token, "Missing parameter(s) for operator " + token);
}
break;
case OPERATOR:
if (stack.peek() < 2)
if (stack.topInt() < 2)
{
if (token.surface.equals(";"))
{
@@ -1402,7 +1404,7 @@ public class Expression
throw new ExpressionException(c, this, token, "Missing parameter(s) for operator " + token);
}
// pop the operator's 2 parameters and add the result
stack.set(stack.size() - 1, stack.peek() - 2 + 1);
stack.set(stack.size() - 1, stack.topInt() - 2 + 1);
break;
case FUNCTION:
//ILazyFunction f = functions.get(token.surface);// don't validate global - userdef functions
@@ -1411,7 +1413,7 @@ public class Expression
//{
// throw new ExpressionException(c, this, token, "Function " + token + " expected " + f.getNumParams() + " parameters, got " + numParams);
//}
stack.pop();
stack.popInt();
// due to unpacking, all functions can have variable number of arguments
// we will be checking that at runtime.
// TODO try analyze arguments and assess if its possible that they are static
@@ -1420,13 +1422,13 @@ public class Expression
throw new ExpressionException(c, this, token, "Too many function calls, maximum scope exceeded");
}
// push the result of the function
stack.set(stack.size() - 1, stack.peek() + 1);
stack.set(stack.size() - 1, stack.topInt() + 1);
break;
case OPEN_PAREN:
stack.push(0);
break;
default:
stack.set(stack.size() - 1, stack.peek() + 1);
stack.set(stack.size() - 1, stack.topInt() + 1);
}
}
@@ -1434,11 +1436,11 @@ public class Expression
{
throw new ExpressionException(c, this, "Too many unhandled function parameter lists");
}
else if (stack.peek() > 1)
else if (stack.topInt() > 1)
{
throw new ExpressionException(c, this, "Too many numbers or variables");
}
else if (stack.peek() < 1)
else if (stack.topInt() < 1)
{
throw new ExpressionException(c, this, "Empty expression");
}