From: Eric Wong <e@80x24.org>
Date: Fri, 29 Nov 2019 12:25:05 +0000 (+0000)
Subject: git: async batch interface
X-Git-Tag: v1.3.0~236
X-Git-Url: http://www.git.stargrave.org/?a=commitdiff_plain;h=46baf956987dca495ed44b1050e64939fae5c8ab;hp=46baf956987dca495ed44b1050e64939fae5c8ab;p=public-inbox.git

git: async batch interface

This is a transitionary interface which does NOT require an
event loop.  It can be plugged into in current synchronous code
without major surgery.

It allows HTTP/1.1 pipelining-like functionality by taking
advantage of predictable and well-specified POSIX pipe semantics
by stuffing multiple git cat-file requests into the --batch pipe

With xt/git_async_cmp.t and GIANT_GIT_DIR=git.git, the async
interface is 10-25% faster than the synchronous interface since
it can keep the "git cat-file" process busier.

This is expected to improve performance on systems with slower
storage (but multiple cores).
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