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Save a small amount of allocations during init #17180

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May 13, 2021
Merged

Save a small amount of allocations during init #17180

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70 changes: 40 additions & 30 deletions core/deployment/src/main/java/io/quarkus/deployment/recording/BytecodeRecorderImpl.java
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Original file line number Diff line number Diff line change
Expand Up @@ -1103,8 +1103,8 @@ private DeferredParameter loadComplexObject(Object param, Map<Object, DeferredPa
//a list of steps that are performed on the object after it has been created
//we need to create all these first, to ensure the required objects have already
//been deserialized
List<SerialzationStep> setupSteps = new ArrayList<>();
List<SerialzationStep> ctorSetupSteps = new ArrayList<>();
List<SerializationStep> setupSteps = new ArrayList<>();
List<SerializationStep> ctorSetupSteps = new ArrayList<>();

boolean relaxedOk = false;
if (param instanceof Collection) {
Expand All @@ -1113,7 +1113,7 @@ private DeferredParameter loadComplexObject(Object param, Map<Object, DeferredPa
DeferredParameter val = i != null
? loadObjectInstance(i, existing, i.getClass(), relaxedValidation)
: loadObjectInstance(null, existing, Object.class, relaxedValidation);
setupSteps.add(new SerialzationStep() {
setupSteps.add(new SerializationStep() {
@Override
public void handle(MethodContext context, MethodCreator method, DeferredArrayStoreParameter out) {
//each step can happen in a new method, so it is safe to do this
Expand All @@ -1136,7 +1136,7 @@ public void prepare(MethodContext context) {
DeferredParameter val = i.getValue() != null
? loadObjectInstance(i.getValue(), existing, i.getValue().getClass(), relaxedValidation)
: loadObjectInstance(null, existing, Object.class, relaxedValidation);
setupSteps.add(new SerialzationStep() {
setupSteps.add(new SerializationStep() {
@Override
public void handle(MethodContext context, MethodCreator method, DeferredArrayStoreParameter out) {
method.invokeInterfaceMethod(MAP_PUT, context.loadDeferred(out), context.loadDeferred(key),
Expand Down Expand Up @@ -1221,7 +1221,7 @@ public void prepare(MethodContext context) {
params.add(toAdd);

}
setupSteps.add(new SerialzationStep() {
setupSteps.add(new SerializationStep() {
@Override
public void handle(MethodContext context, MethodCreator method,
DeferredArrayStoreParameter out) {
Expand Down Expand Up @@ -1261,7 +1261,7 @@ public void prepare(MethodContext context) {
relaxedValidation);
def.put(key, val);
}
setupSteps.add(new SerialzationStep() {
setupSteps.add(new SerializationStep() {
@Override
public void handle(MethodContext context, MethodCreator method,
DeferredArrayStoreParameter out) {
Expand Down Expand Up @@ -1337,7 +1337,7 @@ public void prepare(MethodContext context) {
i.getPropertyType(), relaxedValidation);
if (ctorParamIndex != null) {
nonDefaultConstructorHandles[ctorParamIndex] = val;
ctorSetupSteps.add(new SerialzationStep() {
ctorSetupSteps.add(new SerializationStep() {
@Override
public void handle(MethodContext context, MethodCreator method, DeferredArrayStoreParameter out) {

Expand All @@ -1350,7 +1350,7 @@ public void prepare(MethodContext context) {
});
} else {
Class finalPropertyType = propertyType;
setupSteps.add(new SerialzationStep() {
setupSteps.add(new SerializationStep() {
@Override
public void handle(MethodContext context, MethodCreator method, DeferredArrayStoreParameter out) {
method.invokeVirtualMethod(
Expand Down Expand Up @@ -1389,7 +1389,7 @@ public void prepare(MethodContext context) {
relaxedValidation);
if (ctorParamIndex != null) {
nonDefaultConstructorHandles[ctorParamIndex] = val;
ctorSetupSteps.add(new SerialzationStep() {
ctorSetupSteps.add(new SerializationStep() {
@Override
public void handle(MethodContext context, MethodCreator method,
DeferredArrayStoreParameter out) {
Expand All @@ -1402,7 +1402,7 @@ public void prepare(MethodContext context) {
}
});
} else {
setupSteps.add(new SerialzationStep() {
setupSteps.add(new SerializationStep() {
@Override
public void handle(MethodContext context, MethodCreator method,
DeferredArrayStoreParameter out) {
Expand Down Expand Up @@ -1445,24 +1445,34 @@ ResultHandle createValue(MethodContext context, MethodCreator method, ResultHand
Arrays.stream(finalCtorHandles).map(m -> context.loadDeferred(m))
.toArray(ResultHandle[]::new));
} else {
try {
param.getClass().getDeclaredConstructor();
out = method.newInstance(ofConstructor(param.getClass()));
} catch (NoSuchMethodException e) {
//fallback for collection types, such as unmodifiableMap
if (SortedMap.class.isAssignableFrom(expectedType)) {
out = method.newInstance(ofConstructor(TreeMap.class));
} else if (Map.class.isAssignableFrom(expectedType)) {
out = method.newInstance(ofConstructor(LinkedHashMap.class));
} else if (List.class.isAssignableFrom(expectedType)) {
if (List.class.isAssignableFrom(param.getClass())) {
// list is a common special case, so let's handle it
List listParam = (List) param;
if (listParam.isEmpty()) {
out = method.newInstance(ofConstructor(ArrayList.class));
} else if (SortedSet.class.isAssignableFrom(expectedType)) {
out = method.newInstance(ofConstructor(TreeSet.class));
} else if (Set.class.isAssignableFrom(expectedType)) {
out = method.newInstance(ofConstructor(LinkedHashSet.class));
} else {
throw new RuntimeException("Unable to serialize objects of type " + param.getClass()
+ " to bytecode as it has no default constructor");
out = method.newInstance(ofConstructor(ArrayList.class, int.class), method.load(listParam.size()));
}
} else {
try {
param.getClass().getDeclaredConstructor();
out = method.newInstance(ofConstructor(param.getClass()));
} catch (NoSuchMethodException e) {
//fallback for collection types, such as unmodifiableMap
if (SortedMap.class.isAssignableFrom(expectedType)) {
out = method.newInstance(ofConstructor(TreeMap.class));
} else if (Map.class.isAssignableFrom(expectedType)) {
out = method.newInstance(ofConstructor(LinkedHashMap.class));
} else if (List.class.isAssignableFrom(expectedType)) {
out = method.newInstance(ofConstructor(ArrayList.class));
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} else if (SortedSet.class.isAssignableFrom(expectedType)) {
out = method.newInstance(ofConstructor(TreeSet.class));
} else if (Set.class.isAssignableFrom(expectedType)) {
out = method.newInstance(ofConstructor(LinkedHashSet.class));
} else {
throw new RuntimeException("Unable to serialize objects of type " + param.getClass()
+ " to bytecode as it has no default constructor");
}
}
}
}
Expand All @@ -1477,15 +1487,15 @@ ResultHandle createValue(MethodContext context, MethodCreator method, ResultHand
void doPrepare(MethodContext context) {
//this is where the object construction happens
//first create the actial object
for (SerialzationStep i : ctorSetupSteps) {
for (SerializationStep i : ctorSetupSteps) {
i.prepare(context);
}
objectValue.prepare(context);
for (SerialzationStep i : setupSteps) {
for (SerializationStep i : setupSteps) {
//then prepare the steps (i.e. creating the values to be placed into this object)
i.prepare(context);
}
for (SerialzationStep i : setupSteps) {
for (SerializationStep i : setupSteps) {
//now actually run the steps (i.e. actually stick the values into the object)
context.writeInstruction(new InstructionGroup() {
@Override
Expand Down Expand Up @@ -1792,7 +1802,7 @@ final ResultHandle doLoad(MethodContext context, MethodCreator method, ResultHan
/**
* A step that must be executed to serialize a complex object
*/
interface SerialzationStep {
interface SerializationStep {

void handle(MethodContext context, MethodCreator method, DeferredArrayStoreParameter out);

Expand Down