Init slice with provided capacity if it's known in advance

.gitignore

@@ -9,6 +9,9 @@
 # VS Code
 .vscode
 
+# IntelliJ
+.idea
+
 # macOS
 .DS_Store
 

api/queries_repo.go

@@ -97,7 +97,7 @@ type RepoNetworkResult struct {
 
 // RepoNetwork inspects the relationship between multiple GitHub repositories
 func RepoNetwork(client *Client, repos []ghrepo.Interface) (RepoNetworkResult, error) {
-	queries := []string{}
+	queries := make([]string, 0, len(repos))
 	for i, repo := range repos {
 		queries = append(queries, fmt.Sprintf(`
 		repo_%03d: repository(owner: %q, name: %q) {
@@ -150,7 +150,7 @@ func RepoNetwork(client *Client, repos []ghrepo.Interface) (RepoNetworkResult, e
 		return result, err
 	}
 
-	keys := []string{}
+	keys := make([]string, 0, len(graphqlResult))
 	for key := range graphqlResult {
 		keys = append(keys, key)
 	}

command/issue.go

@@ -429,7 +429,7 @@ func labelList(issue api.Issue) string {
 		return ""
 	}
 
-	labelNames := []string{}
+	labelNames := make([]string, 0, len(issue.Labels.Nodes))
 	for _, label := range issue.Labels.Nodes {
 		labelNames = append(labelNames, label.Name)
 	}

command/pr_checkout.go

@@ -38,8 +38,7 @@ func prCheckout(cmd *cobra.Command, args []string) error {
 		headRemote, _ = remotes.FindByRepo(pr.HeadRepositoryOwner.Login, pr.HeadRepository.Name)
 	}
 
-	cmdQueue := [][]string{}
-
+	cmdQueue := make([][]string, 0, 4)
 	newBranchName := pr.HeadRefName
 	if headRemote != nil {
 		// there is an existing git remote for PR head

command/root.go

@@ -97,7 +97,7 @@ var initContext = func() context.Context {
 // BasicClient returns an API client that borrows from but does not depend on
 // user configuration
 func BasicClient() (*api.Client, error) {
-	opts := []api.ClientOption{}
+	opts := make([]api.ClientOption, 0, 1)
 	if verbose := os.Getenv("DEBUG"); verbose != "" {
 		opts = append(opts, apiVerboseLog())
 	}
@@ -122,7 +122,7 @@ var apiClientForContext = func(ctx context.Context) (*api.Client, error) {
 	if err != nil {
 		return nil, err
 	}
-	opts := []api.ClientOption{}
+	opts := make([]api.ClientOption, 0, 4)
 	if verbose := os.Getenv("DEBUG"); verbose != "" {
 		opts = append(opts, apiVerboseLog())
 	}

command/title_body_survey.go

@@ -54,7 +54,7 @@ func selectTemplate(templatePaths []string) (string, error) {
 		Index int
 	}{}
 	if len(templatePaths) > 1 {
-		templateNames := []string{}
+		templateNames := make([]string, 0, len(templatePaths))
 		for _, p := range templatePaths {
 			templateNames = append(templateNames, githubtemplate.ExtractName(p))
 		}
@@ -110,7 +110,7 @@ func titleBodySurvey(cmd *cobra.Command, providedTitle string, providedBody stri
 		},
 	}
 
-	qs := []*survey.Question{}
+	var qs = []*survey.Question{}
 	if providedTitle == "" {
 		qs = append(qs, titleQuestion)
 	}

context/context.go

@@ -38,7 +38,7 @@ func ResolveRemotesToRepos(remotes Remotes, client *api.Client, base string) (Re
 	hasBaseOverride := base != ""
 	baseOverride := ghrepo.FromFullName(base)
 	foundBaseOverride := false
-	repos := []ghrepo.Interface{}
+	repos := make([]ghrepo.Interface, 0, lenRemotesForLookup)
 	for _, r := range remotes[:lenRemotesForLookup] {
 		repos = append(repos, r)
 		if ghrepo.IsSame(r, baseOverride) {

git/ssh_config.go

@@ -57,7 +57,7 @@ func ParseSSHConfig() SSHAliasMap {
 		configFiles = append([]string{userConfig}, configFiles...)
 	}
 
-	openFiles := []io.Reader{}
+	openFiles := make([]io.Reader, 0, len(configFiles))
 	for _, file := range configFiles {
 		f, err := os.Open(file)
 		if err != nil {

internal/cobrafish/completion.go

@@ -117,7 +117,7 @@ func flagRequiresArgumentCompletion(flag *pflag.Flag) string {
 }
 
 func subCommandPath(rootCmd *cobra.Command, cmd *cobra.Command) string {
-	path := []string{}
+	path := make([]string, 0, 1)
 	currentCmd := cmd
 	if rootCmd == cmd {
 		return ""
@@ -142,7 +142,7 @@ func rangeCommands(cmd *cobra.Command, callback func(subCmd *cobra.Command)) {
 
 func commandCompletionCondition(rootCmd, cmd *cobra.Command) string {
 	localNonPersistentFlags := cmd.LocalNonPersistentFlags()
-	bareConditions := []string{}
+	bareConditions := make([]string, 0, 1)
 	if rootCmd != cmd {
 		bareConditions = append(bareConditions, fmt.Sprintf("__fish_%s_seen_subcommand_path %s", rootCmd.Name(), subCommandPath(rootCmd, cmd)))
 	} else {