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Performance Increase of Vector of Structures using .NET BlockCopy (#4830)

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* Added Get<vector_name>Array() method for accessing vectors of structures in C# using Buffer.Blockcopy().

* Added Get<vector_name>Array() method for accessing vectors of structures in C# using Buffer.Blockcopy().

Added Create<Name>VectorBlock() method to add a typed array using Buffer.BlockCopy() to speed up creation of vector of arrays

New Lua files for namespace test

* fixed c++ style issue
This commit is contained in:
Derek Bailey
2018-07-26 13:44:40 -07:00
committed by Wouter van Oortmerssen
parent 6e185d06a7
commit 7b50004ec9
12 changed files with 625 additions and 16 deletions
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25
src/idl_gen_general.cpp
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@@ -1102,6 +1102,18 @@ class GeneralGenerator : public BaseGenerator {
code += lang_.accessor_prefix + "__vector_as_arraysegment(";
code += NumToString(field.value.offset);
code += "); }\n";
// For direct blockcopying the data into a typed array
code += " public ";
code += GenTypeBasic(field.value.type.VectorType());
code += "[] Get";
code += MakeCamel(field.name, lang_.first_camel_upper);
code += "Array() { return ";
code += lang_.accessor_prefix + "__vector_as_array<";
code += GenTypeBasic(field.value.type.VectorType());
code += ">(";
code += NumToString(field.value.offset);
code += "); }\n";
break;
default: break;
}
@@ -1324,6 +1336,19 @@ class GeneralGenerator : public BaseGenerator {
code += ".Value";
code += "); return ";
code += "builder." + FunctionStart('E') + "ndVector(); }\n";
// For C#, include a block copy method signature.
if (lang_.language == IDLOptions::kCSharp) {
code += " public static " + GenVectorOffsetType() + " ";
code += FunctionStart('C') + "reate";
code += MakeCamel(field.name);
code += "VectorBlock(FlatBufferBuilder builder, ";
code += GenTypeBasic(vector_type) + "[] data) ";
code += "{ builder." + FunctionStart('S') + "tartVector(";
code += NumToString(elem_size);
code += ", data." + FunctionStart('L') + "ength, ";
code += NumToString(alignment);
code += "); builder.Add(data); return builder.EndVector(); }\n";
}
}
// Generate a method to start a vector, data to be added manually
// after.