[SR-4097] NSNumber array takes too long to compile

[aciidgh]

Previous ID	SR-4097
Radar	None
Original Reporter	@aciidb0mb3r
Type	Bug

Additional Detail from JIRA

Votes	0
Component/s	Compiler
Labels	Bug, Performance, TypeChecker
Assignee	None
Priority	Medium

md5: 15f93e89ff9011f4fc7b8335b323764d

Issue Description:

import Foundation

let x = [
    NSNumber(value : 0),
    NSNumber(value : 1/6),
    NSNumber(value : 3/6),
    NSNumber(value : 5/6),
    // NSNumber(value : 1),
]

$ time swift main.swift
swift main.swift 2.66s user 0.21s system 98% cpu 2.904 total

--

import Foundation

let x = [
    NSNumber(value : 0),
    NSNumber(value : 1/6),
    NSNumber(value : 3/6),
    NSNumber(value : 5/6),
    NSNumber(value : 1),
]

$ time swift main.swift
main.swift:3:9: error: expression was too complex to be solved in reasonable time; consider breaking up the expression into distinct sub-expressions
let x = [
        ^
swift main.swift  11.73s user 1.84s system 99% cpu 13.635 total

[aciidgh]

import Foundation
let x = [NSNumber(value: 0) , NSNumber(value :0.166) , NSNumber(value :0.5) , NSNumber(value :0.833) , NSNumber(value :1)]

swift main.swift  10.51s user 1.34s system 99% cpu 11.939 total

[slavapestov]

This is now fast.