I get "failed-bck-i-search" when ever I CTRL+R in powershell

[wamra]

Environment

PS version: 5.1.18362.1593
PSReadline version: 2.1.0
os: 10.0.18362.1 (WinBuild.160101.0800)
PS file version: 10.0.18362.1 (WinBuild.160101.0800)
HostName: ConsoleHost
BufferWidth: 292
BufferHeight: 9999

Exception report

No Exceptions

Steps to reproduce

When I press CTRL+R the message "failed-bck-i-search" is displayed.

I suspect the cause is my history length

gc -path $((Get-PSReadLineOption).HistorySavePath) |Measure-Object -Line

Lines Words Characters Property
----- ----- ---------- --------
16776

Expected behavior

Fast key presses, CTRL+R to not 'fail'

Actual behavior

My arrow up/down to scroll through history is very slow it takes seconds, and it slows the entire powershell session host.

🎉 This issue was addressed in 2867, which has now been successfully released in v2.2.0-beta4. 🎉