When you are switching branches back and forth, the local results get rebuilt over and over again, even if you are building something that has already been built before.
The build cache remembers the earlier build results, and greatly reduces the need to rebuild things when they have already been built locally.
This can also extend to rebuilding different commits, like when running `git bisect`.

        }
        FileLock fileLock = lockManager.lock(lockTarget, lockOptions, cacheDisplayName);
        try {
            boolean rebuild = initializationAction.requiresInitialization(fileLock);
            if (rebuild) {
                Exception latestException = null;
                for (int tries = 0; rebuild && tries < 3; tries++) {
                    fileLock.close();
                    fileLock = null;

package org.gradle.kotlin.dsl

import org.gradle.api.NamedDomainObjectProvider


/**
 * Allows a [NamedDomainObjectProvider] to be configured via invocation syntax.
 *
 * ```kotlin
 * val rebuild by tasks.registering
 * rebuild { // rebuild.configure {
 *   dependsOn("clean")
 * }
 * ```
 */
operator fun <T> NamedDomainObjectProvider<T>.invoke(action: T.() -> Unit) =

        new IsolatingProcessingStrategy(result)
    }

    def "does a full rebuild when no originating elements are given for a type"() {
        when:
        filer.createSourceFile("Foo")

        then:
        result.fullRebuildCause == "the generated type 'Foo' must have exactly one originating element, but had 0"
    }

    def "does a full rebuild when no originating elements are given for a resource"() {
        when:

	// DeletedClusters contains list of all subset clusters for the deleted DR or updated DR.
	// When clusters are rebuilt, we rebuild the subset clusters as well. So, we know what
	// subset clusters are really needed. So if deleted cluster is not rebuilt, then it is really deleted.
	builtClusters := sets.New[string]()
	for _, c := range clusters {
		builtClusters.Insert(c.Name)
	}

L19:set GOBUILDFAIL=0
L20:
L21:set GOENV=off
L22:..\bin\go tool dist env > env.bat
L23:if errorlevel 1 goto fail
L24:call .\env.bat
L25:del env.bat
L26:
L27:set GOPATH=c:\nonexist-gopath
L28:
L29:if x%1==x--no-rebuild goto norebuild
L30:..\bin\go tool dist test --rebuild
L31:if errorlevel 1 goto fail
L32:goto end
L33:
L34::norebuild
L35:..\bin\go tool dist test
L36:if errorlevel 1 goto fail
L37:goto end
L38:
L39::fail
L40:set GOBUILDFAIL=1
L41:
L42::end
...

        }
    }

    public boolean isOpen() {
        return store.isOpen();
    }

    private void rebuild() {
        LOGGER.warn("{} is corrupt. Discarding.", this);
        try {
            clear();
        } catch (Exception e) {
            LOGGER.warn("{} couldn't be rebuilt. Closing.", this);
            close();
        }
    }

    public void verify() {
        try {

            }
         """

        outputs.snapshot { succeeds("compileDebugSwift") }

        expect:
        // rebuild for Swift4
        succeeds("compileDebugSwift", "-Pswift4")
        outputs.recompiledClasses('main', 'sum', 'greeter', 'multiply')

        and:
        // rebuild for Swift3
        succeeds("compileDebugSwift")
        outputs.recompiledClasses('main', 'sum', 'greeter', 'multiply')
    }

        }
        final FileLock fileLock = lockManager.lock(lockTarget, lockOptions, cacheDisplayName, "", unused -> {});
        try {
            boolean rebuild = initializationAction.requiresInitialization(fileLock);
            if (rebuild) {
                fileLock.writeFile(() -> initializationAction.initialize(fileLock));
            }
            onOpenAction.accept(fileLock);
        } catch (Exception e) {

class CompositeContinuousBuildIntegrationTest extends AbstractContinuousIntegrationTest {
    def setup() {
        buildTestFixture.withBuildInSubDir()
    }

    def "will rebuild on input change for included build task dependency"() {
        def outputFile = file("included/build/output.txt")
        def inputFile = file("included/inputs/input.txt")
        inputFile.text = "first"