firstelementjp · firstelementjp · Jun 2, 2026 · May 30, 2026 · May 30, 2026 · Jun 1, 2026
diff --git a/.github/skills/architecture/hook-architecture.md b/.github/skills/architecture/hook-architecture.md
@@ -45,43 +45,44 @@
 
 ### Header Hooks
 
-| Hook                                    | Parameters                    | Purpose                                                  |
-| --------------------------------------- | ----------------------------- | -------------------------------------------------------- |
+| Hook                                               | Parameters                    | Purpose                                                  |
+| -------------------------------------------------- | ----------------------------- | -------------------------------------------------------- |
 | `fe_csv_import_export_basic_post_fields`           | `$fields, $scope`             | Customize basic export fields (ID, title, content, etc.) |
 | `fe_csv_import_export_additional_post_fields`      | `$fields, $scope`             | Customize 'all' scope additional fields                  |
 | `fe_csv_import_export_filter_taxonomy_objects`     | `$taxonomy_objects, $args`    | Filter taxonomy objects before header creation           |
 | `fe_csv_import_export_filter_custom_field_headers` | `$headers, $meta_keys, $args` | Customize custom field headers (Pro: enhanced features)  |
 
 ### Query Hooks
 
-| Hook                          | Parameters           | Purpose                                        |
-| ----------------------------- | -------------------- | ---------------------------------------------- |
+| Hook                                     | Parameters           | Purpose                                        |
+| ---------------------------------------- | -------------------- | ---------------------------------------------- |
 | `fe_csv_import_export_sample_query_args` | `$query_args, $args` | Customize sample post query for meta discovery |
 | `fe_csv_import_export_export_query_args` | `$query_args, $args` | Customize main export query                    |
 
 ### Import Hooks
 
-| Hook                         | Parameters                | Purpose                                |
-| ---------------------------- | ------------------------- | -------------------------------------- |
-| `fe_csv_import_export_pre_ajax_import`  | `$result, $_POST`         | Preflight import request validation    |
-| `fe_csv_import_export_user_can_import`  | `$allowed`                | Override import capability checks      |
-| `fe_csv_import_export_before_import`    | `$args`                   | Pre-import preparation                 |
-| `fe_csv_import_export_import_row`       | `$row_data, $args`        | Per-row data transformation            |
-| `fe_csv_import_export_after_import`     | `$stats, $args`           | Post-import cleanup                    |
-| `fe_csv_import_export_cancelled_import` | `$cancelled, $session_id` | Override import cancellation detection |
+| Hook                                         | Parameters                              | Purpose                                            |
+| -------------------------------------------- | --------------------------------------- | -------------------------------------------------- |
+| `fe_csv_import_export_pre_ajax_import`       | `$result, $_POST`                       | Preflight import request validation                |
+| `fe_csv_import_export_user_can_import`       | `$allowed`                              | Override import capability checks                  |
+| `fe_csv_import_export_before_import`         | `$args`                                 | Pre-import preparation                             |
+| `fe_csv_import_export_import_row`            | `$row_data, $args`                      | Per-row data transformation                        |
+| `fe_csv_import_export_after_import`          | `$stats, $args`                         | Post-import cleanup                                |
+| `fe_csv_import_export_cancelled_import`      | `$cancelled, $session_id`               | Override import cancellation detection             |
+| `fe_csv_import_export_import_max_batch_size` | `$max_batch_size, $total_rows, $config` | Customize maximum import batch size (default: 500) |
 
 ### Export Hooks
 
-| Hook                         | Parameters                | Purpose                                |
-| ---------------------------- | ------------------------- | -------------------------------------- |
+| Hook                                    | Parameters                | Purpose                                |
+| --------------------------------------- | ------------------------- | -------------------------------------- |
 | `fe_csv_import_export_pre_ajax_export`  | `$result, $_POST`         | Preflight export request validation    |
 | `fe_csv_import_export_user_can_export`  | `$allowed`                | Override export capability checks      |
 | `fe_csv_import_export_cancelled_export` | `$cancelled, $session_id` | Override export cancellation detection |
 
 ### Import Processing Hooks
 
-| Hook                                 | Parameters                          | Purpose                            |
-| ------------------------------------ | ----------------------------------- | ---------------------------------- |
+| Hook                                            | Parameters                          | Purpose                            |
+| ----------------------------------------------- | ----------------------------------- | ---------------------------------- |
 | `fe_csv_import_export_import_row_context`       | `$context, $row_data, $args`        | Customize row context creation     |
 | `fe_csv_import_export_import_persist_result`    | `$result, $post_data, $context`     | Modify post persistence result     |
 | `fe_csv_import_export_taxonomy_term_resolution` | `$term_ids, $term_value, $taxonomy` | Customize taxonomy term resolution |

diff --git a/AGENT.md b/AGENT.md
@@ -8,7 +8,7 @@
 **FE CSV Import & Export** is a WordPress plugin for CSV import/export.
 Supports custom post types, custom taxonomies, and custom fields.
 
-- **Version**: 0.9.9
+- **Version**: 1.0.0
 - **License**: GPL-2.0+
 - **PHP**: >= 8.1 (recommended)
 - **Repository**: https://github.com/firstelementjp/fe-csv-import-export

diff --git a/README.md b/README.md
@@ -2,7 +2,7 @@
 
 ![FE CSV Import & Export Banner](https://github.com/firstelementjp/fe-csv-import-export/blob/main/assets/images/img-sns-banner-80.jpg?raw=true)
 
-[![Version](https://img.shields.io/badge/version-0.9.9.4-green.svg)](https://github.com/firstelementjp/fe-csv-import-export/releases)
+[![Version](https://img.shields.io/badge/version-1.0.0-green.svg)](https://github.com/firstelementjp/fe-csv-import-export/releases)
 [![License](https://img.shields.io/badge/License-GPLv2%2B-blue.svg)](https://www.gnu.org/licenses/gpl-2.0.html)
 [![WordPress](https://img.shields.io/badge/WordPress-6.6%2B-blue.svg)](https://wordpress.org/)
 [![Ask DeepWiki](https://deepwiki.com/badge.svg)](https://deepwiki.com/firstelementjp/fe-csv-import-export)
@@ -15,12 +15,11 @@ For end-user guides and full documentation, see the links below.
 
 ## ✨ Recent Highlights
 
-- Bundled JavaScript files to reduce HTTP requests and improve page load performance
-- Updated export batch planner to use memory_limit for dynamic batch size calculation
-- Reduced memory usage for large CSV imports by streaming batch reads and reusing file offsets
-- Improved import log tab behavior and preserved recent logs at completion
-- Fixed CSV quote parsing for edge cases involving backslash-escaped double quotes in legacy data
-- Cleaned up local release workflow so `test-release` and generated minified assets do not remain tracked in Git
+- Taxonomy optimization for unchanged terms significantly reduces processing time for update-heavy imports
+- Increased default import batch size from 100 to 500 rows to reduce AJAX overhead
+- Added configurable batch size limit filter for per-site customization
+- Detailed import profiling with WP_DEBUG batch profile logging for performance analysis
+- Fixed JavaScript ES module import syntax to resolve browser compatibility issues
 
 ## 📖 Overview
 

diff --git a/assets/js/fe-csv-import-export-main.js b/assets/js/fe-csv-import-export-main.js
@@ -5,20 +5,6 @@
  *
  */
 
-// Import core modules
-import './fe-csv-import-export-core.js';
-
-// Import export modules
-import './export/fe-csv-import-export/ajax.js';
-import './export/fe-csv-import-export/download.js';
-import './export/fe-csv-import-export/form.js';
-import './export/fe-csv-import-export/ui.js';
-import './export/fe-csv-import-export/logs.js';
-import './fe-csv-import-export-export-unified.js';
-import './export/fe-csv-import-export/original.js';
-import './fe-csv-import-export-import.js';
-import './fe-csv-import-export-license.js';
-
 /**
  * Bootstrap FE CSV Import & Export admin scripts when the DOM is ready.
  */

diff --git a/docs/README.md b/docs/README.md
@@ -5,7 +5,7 @@
 > CSV import/export for WordPress with localized admin UI, automatic batch processing, and developer extensibility.
 
 [![License](https://img.shields.io/badge/license-GPL--2.0%2B-blue.svg)](legal.md)
-[![Version](https://img.shields.io/badge/version-0.9.9.4-green.svg)](https://github.com/firstelementjp/fe-csv-import-export/releases)
+[![Version](https://img.shields.io/badge/version-1.0.0-green.svg)](https://github.com/firstelementjp/fe-csv-import-export/releases)
 [![WordPress](https://img.shields.io/badge/WordPress-6.6%2B-blue.svg)](https://wordpress.org/)
 
 FE CSV Import & Export is a WordPress plugin for importing and exporting post data as CSV from the admin area.
@@ -29,11 +29,11 @@ FE CSV Import & Export is a WordPress plugin for importing and exporting post da
 
 ## 📥 Download
 
-[Download fe-csv-import-export-0.9.9.4.zip](https://github.com/firstelementjp/fe-csv-import-export/releases/download/v0.9.9.4/fe-csv-import-export-0.9.9.4.zip){: .download-btn }
+[Download fe-csv-import-export-1.0.0.zip](https://github.com/firstelementjp/fe-csv-import-export/releases/download/v1.0.0/fe-csv-import-export-1.0.0.zip){: .download-btn }
 
 ## 🚀 Quick Start
 
-1. Download `fe-csv-import-export-0.9.9.4.zip`
+1. Download `fe-csv-import-export-1.0.0.zip`
 2. Upload and activate the plugin in WordPress
 3. Open **Tools → FE CSV Import & Export**
 4. Run a small test import or export first

diff --git a/docs/changes.md b/docs/changes.md
@@ -1,5 +1,20 @@
 # 📋 Changelog
 
+## [1.0.0] - 2026-06-02
+
+### 🚀 Performance Improvements
+
+- **Taxonomy optimization for unchanged terms** - Import now skips `wp_set_post_terms()` calls when taxonomy terms are unchanged, significantly reducing processing time for update-heavy imports.
+- **Increased default batch size** - Default import batch size increased from 100 to 500 rows, reducing AJAX overhead for large imports.
+- **Configurable batch size limit** - New `fe_csv_import_export_import_max_batch_size` filter allows per-site customization of the maximum batch size.
+- **Detailed import profiling** - Added granular profiling for import phases (preload, row context, row processor, meta/taxonomy preparation and application) with WP_DEBUG batch profile logging.
+
+### 🛠️ Bug Fixes
+
+- **Fixed JavaScript ES module import syntax** - Removed static ES module imports from main JS file to resolve browser syntax errors.
+
+---
+
 ## [0.9.9.4] - 2026-05-27
 
 ### 🚀 Performance Improvements

diff --git a/docs/install.md b/docs/install.md
@@ -10,7 +10,7 @@
 
 ## Manual Installation
 
-1. [Download latest version (v0.9.9.4)](https://github.com/firstelementjp/fe-csv-import-export/releases/download/v0.9.9.4/fe-csv-import-export-0.9.9.4.zip)
+1. [Download latest version (v1.0.0)](https://github.com/firstelementjp/fe-csv-import-export/releases/download/v1.0.0/fe-csv-import-export-1.0.0.zip)
 2. Extract the downloaded ZIP file
 3. Upload `fe-csv-import-export` folder to `/wp-content/plugins/`
 4. Navigate to **Plugins** in WordPress admin

diff --git a/fe-csv-import-export.php b/fe-csv-import-export.php
@@ -3,7 +3,7 @@
  * Plugin Name:  FE CSV Import & Export
  * Plugin URI:   https://github.com/firstelementjp/fe-csv-import-export
  * Description:  Simple yet powerful CSV import/export plugin for WordPress. Supports custom post types, custom taxonomies, and custom fields.
- * Version:      0.9.9.4
+ * Version:      1.0.0
  * Author:       FirstElement K.K., Daijiro Miyazawa
  * Author URI:   https://www.firstelement.co.jp/
  * License:      GPL-2.0+
@@ -20,7 +20,7 @@
 }
 
 // Define plugin constants.
-define( 'FE_CSV_IMPORT_EXPORT_VERSION', '0.9.9.4' );
+define( 'FE_CSV_IMPORT_EXPORT_VERSION', '1.0.0' );
 define( 'FE_CSV_IMPORT_EXPORT_PLUGIN_DIR', plugin_dir_path( __FILE__ ) );
 define( 'FE_CSV_IMPORT_EXPORT_PLUGIN_URL', plugin_dir_url( __FILE__ ) );
 define( 'FE_CSV_IMPORT_EXPORT_BASENAME', plugin_basename( __FILE__ ) );

diff --git a/includes/admin/class-fe-csv-import-export-admin-assets.php b/includes/admin/class-fe-csv-import-export-admin-assets.php
@@ -73,8 +73,12 @@ public function enqueue_scripts( $hook ) {
 				? (bool) FE_CSV_Import_Export_Settings_Helper::get( 'advanced', 'enable_logs', true )
 				: true;
 
+			// Temporarily force individual files for both debug and production modes
+			// to resolve dialog opening issue in production mode
+			$force_individual_files = true;
+
 			// Use bundled script for production, individual files for debug mode
-			if ( $debug_mode ) {
+			if ( $debug_mode || $force_individual_files ) {
 				// Debug mode: load individual files for easier debugging
 				$script_url = static function ( $relative_path ) use ( $suffix ) {
 					$min_path      = preg_replace( '/\.js$/', $suffix . '.js', $relative_path );
@@ -315,7 +319,8 @@ public function enqueue_scripts( $hook ) {
 			}
 
 			// Localize script (use the main script handle based on mode)
-			$main_script_handle = $debug_mode ? 'fe-csv-import-export-core' : 'fe-csv-import-export-admin';
+			// When forcing individual files, always use core handle
+			$main_script_handle = ( $debug_mode || $force_individual_files ) ? 'fe-csv-import-export-core' : 'fe-csv-import-export-admin';
 
 			wp_localize_script(
 				$main_script_handle,

diff --git a/includes/import/class-fe-csv-import-export-ajax-import-batch-planner.php b/includes/import/class-fe-csv-import-export-ajax-import-batch-planner.php
@@ -29,17 +29,82 @@ class FE_CSV_Import_Export_Ajax_Import_Batch_Planner {
 	 * @return int Batch size.
 	 */
 	public function get_import_batch_size( int $total_rows, array $config ): int {
-		$max_execution_time = ini_get( 'max_execution_time' );
-		$max_execution_time = $max_execution_time ? (int) $max_execution_time : 30;
-		$max_execution_time = max( 1, $max_execution_time );
+		if ( $total_rows <= 0 ) {
+			return 1;
+		}
+
+		$max_execution_time = $this->get_max_execution_time();
+		$safe_time_limit    = $max_execution_time * 0.8;
+		$avg_time_per_row   = 0.02;
+		$time_based_batch   = max( 1, (int) floor( $safe_time_limit / $avg_time_per_row ) );
 
-		$safe_time_limit      = $max_execution_time * 0.5;
-		$avg_time_per_row     = 0.35;
-		$time_based_batch     = max( 1, (int) floor( $safe_time_limit / $avg_time_per_row ) );
-		$optimized_batch_size = max( 10, min( 50, $time_based_batch ) );
+		$memory_limit       = $this->convert_memory_limit_to_bytes( (string) ini_get( 'memory_limit' ) );
+		$memory_limit       = max( 64 * 1024 * 1024, $memory_limit );
+		$available_memory   = max( 16 * 1024 * 1024, $memory_limit - ( 48 * 1024 * 1024 ) );
+		$memory_per_row     = 128 * 1024;
+		$memory_based_batch = max( 1, (int) floor( $available_memory / $memory_per_row ) );
 
-		$base_batch_size = max( 1, min( $total_rows, $optimized_batch_size ) );
+		$optimized_batch_size = min( $time_based_batch, $memory_based_batch, $total_rows );
+		$max_batch_size       = (int) apply_filters( 'fe_csv_import_export_import_max_batch_size', 500, $total_rows, $config );
+		$max_batch_size       = max( 10, $max_batch_size );
+		$base_batch_size      = max( 10, min( $max_batch_size, $optimized_batch_size ) );
+		$base_batch_size      = min( $total_rows, $base_batch_size );
 
 		return (int) apply_filters( 'fe_csv_import_export_import_batch_size', $base_batch_size, $total_rows, $config );
 	}
+
+	/**
+	 * Get max execution time with a safe fallback.
+	 *
+	 * @since 0.9.8
+	 * @return int Max execution time in seconds.
+	 */
+	private function get_max_execution_time(): int {
+		$max_execution_time = ini_get( 'max_execution_time' );
+		$max_execution_time = false === $max_execution_time ? 30 : (int) $max_execution_time;
+
+		if ( $max_execution_time <= 0 ) {
+			return 120;
+		}
+
+		return max( 1, $max_execution_time );
+	}
+
+	/**
+	 * Convert memory limit string to bytes.
+	 *
+	 * @since 0.9.8
+	 * @param string $memory_limit Memory limit string.
+	 * @return int Memory limit in bytes.
+	 */
+	private function convert_memory_limit_to_bytes( string $memory_limit ): int {
+		$memory_limit = strtoupper( trim( $memory_limit ) );
+
+		if ( '-1' === $memory_limit ) {
+			return PHP_INT_MAX;
+		}
+
+		if ( '' === $memory_limit ) {
+			return 128 * 1024 * 1024;
+		}
+
+		$unit  = substr( $memory_limit, -1 );
+		$value = (int) substr( $memory_limit, 0, -1 );
+
+		switch ( $unit ) {
+			case 'G':
+				$value *= 1024 * 1024 * 1024;
+				break;
+			case 'M':
+				$value *= 1024 * 1024;
+				break;
+			case 'K':
+				$value *= 1024;
+				break;
+			default:
+				$value = (int) $memory_limit;
+		}
+
+		return $value > 0 ? $value : 128 * 1024 * 1024;
+	}
 }