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sbt, the interactive build tool
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Ethan Atkins 38d67cfdf0 Improve sbt build load time by 25% 
The sbt project load made a number of relatively inefficient
transformations of scala collecitons. I went through and found the slow
parts during project loading and made my best attempt at fixing them.
The most significant changes I made were in places using IMap. An IMap
is more or less a wrapper around an immutable Map. It can be much faster
to construct an IMap by creating a java mutable hashmap, wrapping it a
scala Map that delegates to the underlying java hashmap (with a copy on
write if the map is modified) and constructing the IMap from the wrapped
map. It was also in many cases to parallelize some transformations
wherever the order didn't matter.

After applying all of these changes, I found that loading the sbt
project took generally between 8.5 and 9 seconds on my laptop. With
1.3.13, it hovered around 11.5 seconds. I saw a similar speedup in zinc.
The biggest specific improvement was that generating the compiled map
dropped from between 3.5-4 seconds to pretty consistently being around
1.5 seconds.
 		2020-07-26 19:52:26 -07:00
.github/ISSUE_TEMPLATE Update issue template 2020-02-03 14:28:20 -05:00
client Upgrade LineReader to JLine3 2020-07-10 13:37:53 -07:00
core-macros/src/main/scala/sbt/internal/util/appmacro Document parts of AList & components of TupleSyntax 2020-02-17 07:15:37 +00:00
internal Improve sbt build load time by 25% 2020-07-26 19:52:26 -07:00
launch Adds sbt.boot.lock sysprop to opt-out 2018-02-08 13:02:39 +00:00
licenses move remaining pieces of sbt subproject to sbt_pending and fix notices 2010-09-21 21:55:50 -04:00
main Improve sbt build load time by 25% 2020-07-26 19:52:26 -07:00
main-actions/src Update sbt for latest zinc apis 2020-07-22 15:00:56 -07:00
main-command/src Merge branch 'develop' into client-system-err 2020-07-22 09:16:10 -07:00
main-settings/src Add multi-client ui to server 2020-06-24 19:40:17 -07:00
notes Merge pull request #5041 from jsoref/https 2020-06-14 17:34:58 -04:00
project Zinc 1.4.0-M7 2020-07-24 23:50:54 -04:00
protocol/src/main Support System.err in thin client 2020-07-21 13:27:32 -07:00
run Add loop to SelectMainClass 2020-07-10 13:37:54 -07:00
sbt/src Bring back Dotty 2020-07-25 00:29:56 -04:00
scripted-plugin/src/main/scala/sbt -Xfatal-warnings in most subprojects 2018-09-18 11:47:55 -04:00
scripted-sbt-old/src/main/scala/sbt/test Update header 2018-09-14 04:53:36 -04:00
scripted-sbt-redux Prevent simultaneous server booting 2020-06-29 16:41:33 -07:00
server-test/src Comment out test that is timing out 2020-07-25 10:26:33 -04:00
src/main/conscript sbt 1.3.0 2019-09-04 01:24:08 -04:00
tasks Name threads in completion service 2020-06-22 13:14:55 -07:00
tasks-standard Selective functor 2020-05-17 23:36:04 -04:00
testing Contraband 0.4.6 2020-04-24 17:44:15 -04:00
util-cache Don't use last modified time of directories in doc 2020-01-13 13:11:09 -08:00
util-tracking update scaladoc to reflect argument type of the overload 2020-04-24 16:54:48 +02:00
vscode-sbt-scala https://www.apple.com 2019-09-05 14:11:07 -04:00
zinc-lm-integration/src integrate with VirtualFile changes 2020-04-24 17:44:14 -04:00
.appveyor.yml Fix TestServer for windows 2020-06-29 09:44:24 -07:00
.gitattributes Contraband 0.4.6 2020-04-24 17:44:15 -04:00
.gitignore Update .gitignore for metals support 2020-05-16 09:52:20 +02:00
.java-version Configure JVM 1.8 in .java-version 2016-10-07 08:48:23 -05:00
.mailmap Add mailmap 2019-06-11 09:30:14 +02:00
.scalafmt.conf Set `lineEndings = preserve` in .scalafmt.conf 2020-06-29 08:15:24 -07:00
.travis.yml Update scala to 2.12.11 2020-03-18 00:49:14 -07:00
CONTRIBUTING.md https://www.scala-sbt.org 2019-09-05 14:11:13 -04:00
DEVELOPING.md Merge pull request #5041 from jsoref/https 2020-06-14 17:34:58 -04:00
LICENSE Apache License 2.0 2018-09-14 03:38:58 -04:00
NOTICE Apache License 2.0 2018-09-14 03:38:58 -04:00
PROFILING.md fix typo 2018-07-08 22:18:57 +09:00
README.md Merge pull request #5041 from jsoref/https 2020-06-14 17:34:58 -04:00
SUPPORT.md Split support into SUPPORT.md 2018-04-25 14:55:09 +01:00
build.sbt Remove custom ExternalHooks 2020-07-19 12:16:37 -07:00
reset.sh 1.0.3-SNAPSHOT 2017-09-16 15:52:58 -04:00
sbt-allsources.sh Bump underlying modules to latest 2017-03-23 12:41:24 -04:00
server.md setting query is "sbt/setting" 2017-10-03 01:45:06 -04:00

README.md

Build Status Latest version Gitter Chat

sbt

sbt is a build tool for Scala, Java, and more.

For general documentation, see https://www.scala-sbt.org/.

sbt 1.x

This is the 1.x series of sbt. The source code of sbt is split across several GitHub repositories, including this one.

  • sbt/io hosts sbt.io module.
  • sbt/librarymanagement hosts sbt.librarymanagement module that wraps Ivy.
  • sbt/zinc hosts Zinc, an incremental compiler for Scala.
  • sbt/sbt, this repository hosts modules that implements the build tool.

Other links

  • Setup: Describes getting started with the latest binary release.
  • FAQ: Explains how to get help and more.
  • sbt/sbt-zero-seven: hosts sbt 0.7.7 and earlier versions

Issues and Pull Requests

Please read CONTRIBUTING carefully before opening a GitHub Issue.

The short version: try searching or asking on StackOverflow.

license

See LICENSE.