### Performance Optimizations
- **Caching** - Bean descriptors and reflection metadata are cached for improved performance
- **Lazy initialization** - Resources and expensive operations are initialized only when needed  
- **Memory efficient** - Specialized collections like `LruHashMap` and `ArrayMap` for memory-conscious applications
- **Java 21 features** - Switch expressions and pattern matching for reduced overhead

controlled by the [`x509sha1` setting](/pkg/crypto/x509#InsecureAlgorithmError).
This setting was removed in Go 1.24.

### Go 1.10

Go 1.10 changed how build caching worked and added test caching, along
with the [`gocacheverify`, `gocachehash`, and `gocachetest` settings](/cmd/go/#hdr-Build_and_test_caching).
There is no plan to remove these settings.

### Go 1.6

    fun isCacheable(
      response: Response,
      request: Request,
    ): Boolean {
      // Always go to network for uncacheable response codes (RFC 7231 section 6.1), This
      // implementation doesn't support caching partial content.
      when (response.code) {
        HTTP_OK,
        HTTP_NOT_AUTHORITATIVE,
        HTTP_NO_CONTENT,
        HTTP_MULT_CHOICE,
        HTTP_MOVED_PERM,
        HTTP_NOT_FOUND,

                /* The SMB_COM_NT_CREATE_ANDX response wordCount is wrong. There's an
                 * extra 16 bytes for some "Offline Files (CSC or Client Side Caching)"
                 * junk. We need to bump up the wordCount here so that this method returns
                 * the correct number of bytes for signing purposes. Otherwise we get a
                 * signing verification failure.

    /*
     * This test will catch problems where the underlying iterator
     * throws a RuntimeException when retrieving the nth element.
     *
     * If the PeekingIterator is caching elements too aggressively,
     * it may throw the exception on the (n-1)th element (oops!).
     */

    /* Checks the case where the first element throws an exception. */

    List<Integer> list = emptyList();

    builder.build(CacheLoader.from(Suppliers.ofInstance(null)));
  }

  public void testDisableCaching() {
    // Functional test: assert that CacheBuilderSpec.disableCaching()
    // disables caching.  It's irrelevant how it does so.
    CacheBuilder<Object, Object> builder = CacheBuilder.from(CacheBuilderSpec.disableCaching());
    Object key = new Object();
    Object value = new Object();

                /*
                 * The SMB_COM_NT_CREATE_ANDX response wordCount is wrong. There's an
                 * extra 16 bytes for some "Offline Files (CSC or Client Side Caching)"
                 * junk. We need to bump up the wordCount here so that this method returns
                 * the correct number of bytes for signing purposes. Otherwise we get a
                 * signing verification failure.

  }

  /**
   * Provides a check of whether an exception type is valid for use with {@link
   * FuturesGetChecked#getChecked(Future, Class)}, possibly using caching.
   *
   * <p>Uses reflection to gracefully fall back to when certain implementations aren't available.
   */
  private static final class GetCheckedTypeValidatorHolder {

 * <li>Download and Cache: If Maven finds the artifact in a remote repository, it downloads it and stores it in the local repository for future use.</li>
 * </ol>
 * <p>By caching artifacts in the local repository, Maven minimizes the need to repeatedly download the same artifacts, thus optimizing the build process.</p>
 *
 * <h3>Projects</h3>
 *

```java
/** Dangerous interceptor that rewrites the server's cache-control header. */
private static final Interceptor REWRITE_CACHE_CONTROL_INTERCEPTOR = new Interceptor() {