# {PR title}

HttpSys: new option for response buffering

## Description

{Detail}

As per [old PR 418](aspnet/HttpSysServer#418) (direct copy), enables kernel mode response-buffering in http.sys - with modification to use app-context switch rather than public API change

## Customer Impact

Without this buffer, writes are sent as-written direct thru http.sys; this has two problems:

- fragmentation if writes are small
- issues with latency

## Regression?

- [ ] Yes
- [x] No

[If yes, specify the version the behavior has regressed from]

## Risk

- [ ] High
- [ ] Medium
- [x] Low - opt in, no impact to consumers not using this flag

[Justify the selection above]

## Verification

- [x] Manual (required) - will try to verify with internal MSFT consumer (targeting net6.0)
- [ ] Automated

## Packaging changes reviewed?

- [ ] Yes
- [ ] No
- [x] N/A

----

## When servicing release/2.1

- [ ] Make necessary changes in eng/PatchConfig.props

Co-authored-by: Aditya Mandaleeka <adityamandaleeka@users.noreply.github.com>