Hy JB,
While I was benchmarking the performance of my code flow obfuscation
using some important assemblies, I found that the method
MethodBody.Optimize() is not quite optimized.
In fact, it was taking more than 6 seconds for optimizing all methods
of a 3 MB assembly. This is because every time a branch was optimized,
it had to recompute all instruction offsets from the beginning :
void OptimizeBranches ()
{
ComputeOffsets ();
foreach (Instruction instr in m_instructions) {
if (instr.OpCode.OperandType != OperandType.InlineBrTarget)
continue;
if (OptimizeBranch (instr))
ComputeOffsets (); // <-- This should be changed to not
recompute
all instructions
}
}
By changing a little bit the ComputeOffsets method, I was able to
reduce it's processeing time to less than 1.5 secs. See uploaded file
MethodBody.Optimize.patch
--~--~---------~--~----~------------~-------~--~----~
--
mono-cecil
-~----------~----~----~----~------~----~------~--~---
