tree e7a7f3a7c1e755c8b91e45666c60fae7f818b36c
parent e6152e35ff287ab58e2c17065f02cb1be9f4a0aa
author Derrick Stolee <dstolee@microsoft.com> 1574373880 +0000
committer Junio C Hamano <gitster@pobox.com> 1574406704 +0900

sparse-checkout: add 'cone' mode

The sparse-checkout feature can have quadratic performance as
the number of patterns and number of entries in the index grow.
If there are 1,000 patterns and 1,000,000 entries, this time can
be very significant.

Create a new Boolean config option, core.sparseCheckoutCone, to
indicate that we expect the sparse-checkout file to contain a
more limited set of patterns. This is a separate config setting
from core.sparseCheckout to avoid breaking older clients by
introducing a tri-state option.

The config option does nothing right now, but will be expanded
upon in a later commit.

Signed-off-by: Derrick Stolee <dstolee@microsoft.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>