Slow lookup regression

[kstenerud]

What version of LiteIDE are you using (LiteIDE About - Version and Build Qt Version)?

x37.1, QT 5.5.1

What version of Go are you using (go version)?

1.14.7

What operating system and processor architecture are you using(go env)?

and64 linux

What did you do?

There is a regression of #986

Lookups are slow again on anything newer than go 1.13.