Barely anything at all, in fact I decided to run a little experiment:
[peter /tmp ] $ cat test.nim
import json
var x = newJArray()
for i in 0..10_000_000:
x.add newJString("Hello world")
x.add newJBool(true)
[peter /tmp ] $ cat test2.nim
type
NodeValueKind = enum
nvString
nvBool
NodeValue = ref object
case kind: NodeValueKind
of nvString:
stringValue: string
of nvBool:
boolValue: bool
var x: seq[NodeValue]
for i in 0..10_000_000:
x.add NodeValue(kind: nvString, stringValue: "Hello world")
x.add NodeValue(kind: nvBool, boolValue: true)
[peter /tmp ] $ time ./test
./test 0.67s user 0.36s system 99% cpu 1.037 total
[peter /tmp ] $ time ./test
./test 0.69s user 0.31s system 99% cpu 1.004 total
[peter /tmp ] $ time ./test
./test 0.65s user 0.36s system 99% cpu 1.009 total
[peter /tmp ] $ time ./test2
./test2 0.74s user 0.30s system 99% cpu 1.038 total
[peter /tmp ] $ time ./test2
./test2 0.74s user 0.30s system 99% cpu 1.038 total
[peter /tmp ] $ time ./test2
./test2 0.73s user 0.31s system 99% cpu 1.038 total
Run
Both examples are compiled with 0.19.4 and the -d:release switch. Not entirely
sure why the JSON version appears to be faster, but as far as performance goes
I would say it's pretty good.
