Among other things, he saw segfaults in the GC and found the debugger randomly detaching from the target process. I'd say that's a terrible execution environme

Among other things, he saw segfaults in the GC and found the debugger randomly detaching from the target process. I'd say that's a terrible execution environment, and orthogonal to speed. Sometimes you don't see how bad a tool is until you push it's limits, and I'd say that's just what he did. To use your analogy, I can buy a $2 screwdriver that works fine in many cases, but the shaft might snap or bend if I apply too much torque to it (and no nails in sight).