diff --git a/javascript/extensions.js b/javascript/extensions.js
index 312131b7..cc8ee220 100644
--- a/javascript/extensions.js
+++ b/javascript/extensions.js
@@ -2,8 +2,11 @@
 function extensions_apply(_disabled_list, _update_list, disable_all) {
     var disable = [];
     var update = [];
-
-    gradioApp().querySelectorAll('#extensions input[type="checkbox"]').forEach(function(x) {
+    const extensions_input = gradioApp().querySelectorAll('#extensions input[type="checkbox"]');
+    if (extensions_input.length == 0) {
+        throw Error("Extensions page not yet loaded.");
+    }
+    extensions_input.forEach(function(x) {
         if (x.name.startsWith("enable_") && !x.checked) {
             disable.push(x.name.substring(7));
         }
diff --git a/modules/infotext_utils.py b/modules/infotext_utils.py
index 7e9cceb0..d21d3333 100644
--- a/modules/infotext_utils.py
+++ b/modules/infotext_utils.py
@@ -358,6 +358,9 @@ Steps: 20, Sampler: Euler a, CFG scale: 7, Seed: 965400086, Size: 512x512, Model
     if "Cache FP16 weight for LoRA" not in res and res["FP8 weight"] != "Disable":
         res["Cache FP16 weight for LoRA"] = False
 
+    if "Emphasis" not in res:
+        res["Emphasis"] = "Original"
+
     infotext_versions.backcompat(res)
 
     for key in skip_fields:
diff --git a/modules/processing.py b/modules/processing.py
index f477c9b1..10d0ea5e 100644
--- a/modules/processing.py
+++ b/modules/processing.py
@@ -458,6 +458,7 @@ class StableDiffusionProcessing:
             self.height,
             opts.fp8_storage,
             opts.cache_fp16_weight,
+            opts.emphasis,
         )
 
     def get_conds_with_caching(self, function, required_prompts, steps, caches, extra_network_data, hires_steps=None):
diff --git a/modules/processing_scripts/comments.py b/modules/processing_scripts/comments.py
new file mode 100644
index 00000000..638e39f2
--- /dev/null
+++ b/modules/processing_scripts/comments.py
@@ -0,0 +1,42 @@
+from modules import scripts, shared, script_callbacks
+import re
+
+
+def strip_comments(text):
+    text = re.sub('(^|\n)#[^\n]*(\n|$)', '\n', text)  # while line comment
+    text = re.sub('#[^\n]*(\n|$)', '\n', text)  # in the middle of the line comment
+
+    return text
+
+
+class ScriptStripComments(scripts.Script):
+    def title(self):
+        return "Comments"
+
+    def show(self, is_img2img):
+        return scripts.AlwaysVisible
+
+    def process(self, p, *args):
+        if not shared.opts.enable_prompt_comments:
+            return
+
+        p.all_prompts = [strip_comments(x) for x in p.all_prompts]
+        p.all_negative_prompts = [strip_comments(x) for x in p.all_negative_prompts]
+
+        p.main_prompt = strip_comments(p.main_prompt)
+        p.main_negative_prompt = strip_comments(p.main_negative_prompt)
+
+
+def before_token_counter(params: script_callbacks.BeforeTokenCounterParams):
+    if not shared.opts.enable_prompt_comments:
+        return
+
+    params.prompt = strip_comments(params.prompt)
+
+
+script_callbacks.on_before_token_counter(before_token_counter)
+
+
+shared.options_templates.update(shared.options_section(('sd', "Stable Diffusion", "sd"), {
+    "enable_prompt_comments": shared.OptionInfo(True, "Enable comments").info("Use # anywhere in the prompt to hide the text between # and the end of the line from the generation."),
+}))
diff --git a/modules/script_callbacks.py b/modules/script_callbacks.py
index 48ab289c..2c50f43c 100644
--- a/modules/script_callbacks.py
+++ b/modules/script_callbacks.py
@@ -1,3 +1,4 @@
+import dataclasses
 import inspect
 import os
 from collections import namedtuple
@@ -106,6 +107,15 @@ class ImageGridLoopParams:
         self.rows = rows
 
 
+@dataclasses.dataclass
+class BeforeTokenCounterParams:
+    prompt: str
+    steps: int
+    styles: list
+
+    is_positive: bool = True
+
+
 ScriptCallback = namedtuple("ScriptCallback", ["script", "callback"])
 callback_map = dict(
     callbacks_app_started=[],
@@ -128,6 +138,7 @@ callback_map = dict(
     callbacks_on_reload=[],
     callbacks_list_optimizers=[],
     callbacks_list_unets=[],
+    callbacks_before_token_counter=[],
 )
 event_subscriber_map = dict(
     callbacks_setting_updated=[],
@@ -312,6 +323,14 @@ def list_unets_callback():
     return res
 
 
+def before_token_counter_callback(params: BeforeTokenCounterParams):
+    for c in callback_map['callbacks_before_token_counter']:
+        try:
+            c.callback(params)
+        except Exception:
+            report_exception(c, 'before_token_counter')
+
+
 def setting_updated_event_subscriber_chain(handler, component, setting_name: str):
     """
     Arguments:
@@ -505,6 +524,13 @@ def on_list_unets(callback):
     add_callback(callback_map['callbacks_list_unets'], callback)
 
 
+def on_before_token_counter(callback):
+    """register a function to be called when UI is counting tokens for a prompt.
+    The function will be called with one argument of type BeforeTokenCounterParams, and should modify its fields if necessary."""
+
+    add_callback(callback_map['callbacks_before_token_counter'], callback)
+
+
 def on_setting_updated_subscriber(subscriber_params):
     """register a function to be called after settings update. `subscriber_params`
     should contain necessary fields to register an gradio event handler. Necessary
@@ -513,3 +539,4 @@ def on_setting_updated_subscriber(subscriber_params):
     sure to handle these extra params when defining the callback function.
     """
     event_subscriber_map['callbacks_setting_updated'].append(subscriber_params)
+
diff --git a/modules/sd_emphasis.py b/modules/sd_emphasis.py
new file mode 100644
index 00000000..654817b6
--- /dev/null
+++ b/modules/sd_emphasis.py
@@ -0,0 +1,70 @@
+from __future__ import annotations
+import torch
+
+
+class Emphasis:
+    """Emphasis class decides how to death with (emphasized:1.1) text in prompts"""
+
+    name: str = "Base"
+    description: str = ""
+
+    tokens: list[list[int]]
+    """tokens from the chunk of the prompt"""
+
+    multipliers: torch.Tensor
+    """tensor with multipliers, once for each token"""
+
+    z: torch.Tensor
+    """output of cond transformers network (CLIP)"""
+
+    def after_transformers(self):
+        """Called after cond transformers network has processed the chunk of the prompt; this function should modify self.z to apply the emphasis"""
+
+        pass
+
+
+class EmphasisNone(Emphasis):
+    name = "None"
+    description = "disable the mechanism entirely and treat (:.1.1) as literal characters"
+
+
+class EmphasisIgnore(Emphasis):
+    name = "Ignore"
+    description = "treat all empasised words as if they have no emphasis"
+
+
+class EmphasisOriginal(Emphasis):
+    name = "Original"
+    description = "the orginal emphasis implementation"
+
+    def after_transformers(self):
+        original_mean = self.z.mean()
+        self.z = self.z * self.multipliers.reshape(self.multipliers.shape + (1,)).expand(self.z.shape)
+
+        # restoring original mean is likely not correct, but it seems to work well to prevent artifacts that happen otherwise
+        new_mean = self.z.mean()
+        self.z = self.z * (original_mean / new_mean)
+
+
+class EmphasisOriginalNoNorm(EmphasisOriginal):
+    name = "No norm"
+    description = "same as orginal, but without normalization (seems to work better for SDXL)"
+
+    def after_transformers(self):
+        self.z = self.z * self.multipliers.reshape(self.multipliers.shape + (1,)).expand(self.z.shape)
+
+
+def get_current_option(emphasis_option_name):
+    return next(iter([x for x in options if x.name == emphasis_option_name]), EmphasisOriginal)
+
+
+def get_options_descriptions():
+    return ", ".join(f"{x.name}: {x.description}" for x in options)
+
+
+options = [
+    EmphasisNone,
+    EmphasisIgnore,
+    EmphasisOriginal,
+    EmphasisOriginalNoNorm,
+]
diff --git a/modules/sd_hijack_clip.py b/modules/sd_hijack_clip.py
index 8f29057a..98350ac4 100644
--- a/modules/sd_hijack_clip.py
+++ b/modules/sd_hijack_clip.py
@@ -3,7 +3,7 @@ from collections import namedtuple
 
 import torch
 
-from modules import prompt_parser, devices, sd_hijack
+from modules import prompt_parser, devices, sd_hijack, sd_emphasis
 from modules.shared import opts
 
 
@@ -88,7 +88,7 @@ class FrozenCLIPEmbedderWithCustomWordsBase(torch.nn.Module):
         Returns the list and the total number of tokens in the prompt.
         """
 
-        if opts.enable_emphasis:
+        if opts.emphasis != "None":
             parsed = prompt_parser.parse_prompt_attention(line)
         else:
             parsed = [[line, 1.0]]
@@ -249,6 +249,9 @@ class FrozenCLIPEmbedderWithCustomWordsBase(torch.nn.Module):
                     hashes.append(self.hijack.extra_generation_params.get("TI hashes"))
                 self.hijack.extra_generation_params["TI hashes"] = ", ".join(hashes)
 
+        if any(x for x in texts if "(" in x or "[" in x) and opts.emphasis != "Original":
+            self.hijack.extra_generation_params["Emphasis"] = opts.emphasis
+
         if getattr(self.wrapped, 'return_pooled', False):
             return torch.hstack(zs), zs[0].pooled
         else:
@@ -274,12 +277,14 @@ class FrozenCLIPEmbedderWithCustomWordsBase(torch.nn.Module):
 
         pooled = getattr(z, 'pooled', None)
 
-        # restoring original mean is likely not correct, but it seems to work well to prevent artifacts that happen otherwise
-        batch_multipliers = torch.asarray(batch_multipliers).to(devices.device)
-        original_mean = z.mean()
-        z = z * batch_multipliers.reshape(batch_multipliers.shape + (1,)).expand(z.shape)
-        new_mean = z.mean()
-        z = z * (original_mean / new_mean)
+        emphasis = sd_emphasis.get_current_option(opts.emphasis)()
+        emphasis.tokens = remade_batch_tokens
+        emphasis.multipliers = torch.asarray(batch_multipliers).to(devices.device)
+        emphasis.z = z
+
+        emphasis.after_transformers()
+
+        z = emphasis.z
 
         if pooled is not None:
             z.pooled = pooled
diff --git a/modules/sd_hijack_clip_old.py b/modules/sd_hijack_clip_old.py
index c5c6270b..43e9b952 100644
--- a/modules/sd_hijack_clip_old.py
+++ b/modules/sd_hijack_clip_old.py
@@ -32,7 +32,7 @@ def process_text_old(self: sd_hijack_clip.FrozenCLIPEmbedderWithCustomWordsBase,
 
                 embedding, embedding_length_in_tokens = self.hijack.embedding_db.find_embedding_at_position(tokens, i)
 
-                mult_change = self.token_mults.get(token) if shared.opts.enable_emphasis else None
+                mult_change = self.token_mults.get(token) if shared.opts.emphasis != "None" else None
                 if mult_change is not None:
                     mult *= mult_change
                     i += 1
diff --git a/modules/shared_options.py b/modules/shared_options.py
index 0d3f518e..de5deada 100644
--- a/modules/shared_options.py
+++ b/modules/shared_options.py
@@ -1,7 +1,7 @@
 import os
 import gradio as gr
 
-from modules import localization, ui_components, shared_items, shared, interrogate, shared_gradio_themes, util
+from modules import localization, ui_components, shared_items, shared, interrogate, shared_gradio_themes, util, sd_emphasis
 from modules.paths_internal import models_path, script_path, data_path, sd_configs_path, sd_default_config, sd_model_file, default_sd_model_file, extensions_dir, extensions_builtin_dir, default_output_dir  # noqa: F401
 from modules.shared_cmd_options import cmd_opts
 from modules.options import options_section, OptionInfo, OptionHTML, categories
@@ -154,7 +154,7 @@ options_templates.update(options_section(('sd', "Stable Diffusion", "sd"), {
     "sd_checkpoint_cache": OptionInfo(0, "Checkpoints to cache in RAM", gr.Slider, {"minimum": 0, "maximum": 10, "step": 1}).info("obsolete; set to 0 and use the two settings above instead"),
     "sd_unet": OptionInfo("Automatic", "SD Unet", gr.Dropdown, lambda: {"choices": shared_items.sd_unet_items()}, refresh=shared_items.refresh_unet_list).info("choose Unet model: Automatic = use one with same filename as checkpoint; None = use Unet from checkpoint"),
     "enable_quantization": OptionInfo(False, "Enable quantization in K samplers for sharper and cleaner results. This may change existing seeds").needs_reload_ui(),
-    "enable_emphasis": OptionInfo(True, "Enable emphasis").info("use (text) to make model pay more attention to text and [text] to make it pay less attention"),
+    "emphasis": OptionInfo("Original", "Emphasis mode", gr.Radio, lambda: {"choices": [x.name for x in sd_emphasis.options]}, infotext="Emphasis").info("makes it possible to make model to pay (more:1.1) or (less:0.9) attention to text when you use the syntax in prompt; " + sd_emphasis.get_options_descriptions()),
     "enable_batch_seeds": OptionInfo(True, "Make K-diffusion samplers produce same images in a batch as when making a single image"),
     "comma_padding_backtrack": OptionInfo(20, "Prompt word wrap length limit", gr.Slider, {"minimum": 0, "maximum": 74, "step": 1}).info("in tokens - for texts shorter than specified, if they don't fit into 75 token limit, move them to the next 75 token chunk"),
     "CLIP_stop_at_last_layers": OptionInfo(1, "Clip skip", gr.Slider, {"minimum": 1, "maximum": 12, "step": 1}, infotext="Clip skip").link("wiki", "https://github.com/AUTOMATIC1111/stable-diffusion-webui/wiki/Features#clip-skip").info("ignore last layers of CLIP network; 1 ignores none, 2 ignores one layer"),
@@ -271,6 +271,7 @@ options_templates.update(options_section(('ui_prompt_editing', "Prompt editing",
     "keyedit_delimiters_whitespace": OptionInfo(["Tab", "Carriage Return", "Line Feed"], "Ctrl+up/down whitespace delimiters", gr.CheckboxGroup, lambda: {"choices": ["Tab", "Carriage Return", "Line Feed"]}),
     "keyedit_move": OptionInfo(True, "Alt+left/right moves prompt elements"),
     "disable_token_counters": OptionInfo(False, "Disable prompt token counters").needs_reload_ui(),
+    "include_styles_into_token_counters": OptionInfo(True, "Count tokens of enabled styles").info("When calculating how many tokens the prompt has, also consider tokens added by enabled styles."),
 }))
 
 options_templates.update(options_section(('ui_gallery', "Gallery", "ui"), {
diff --git a/modules/ui.py b/modules/ui.py
index 5744f192..81655525 100644
--- a/modules/ui.py
+++ b/modules/ui.py
@@ -151,7 +151,18 @@ def connect_clear_prompt(button):
     )
 
 
-def update_token_counter(text, steps, *, is_positive=True):
+def update_token_counter(text, steps, styles, *, is_positive=True):
+    params = script_callbacks.BeforeTokenCounterParams(text, steps, styles, is_positive=is_positive)
+    script_callbacks.before_token_counter_callback(params)
+    text = params.prompt
+    steps = params.steps
+    styles = params.styles
+    is_positive = params.is_positive
+
+    if shared.opts.include_styles_into_token_counters:
+        apply_styles = shared.prompt_styles.apply_styles_to_prompt if is_positive else shared.prompt_styles.apply_negative_styles_to_prompt
+        text = apply_styles(text, styles)
+
     try:
         text, _ = extra_networks.parse_prompt(text)
 
@@ -179,8 +190,8 @@ def update_token_counter(text, steps, *, is_positive=True):
     return f"<span class='gr-box gr-text-input'>{token_count}/{max_length}</span>"
 
 
-def update_negative_prompt_token_counter(text, steps):
-    return update_token_counter(text, steps, is_positive=False)
+def update_negative_prompt_token_counter(*args):
+    return update_token_counter(*args, is_positive=False)
 
 
 def setup_progressbar(*args, **kwargs):
@@ -491,8 +502,10 @@ def create_ui():
                 height,
             ]
 
-            toprow.token_button.click(fn=wrap_queued_call(update_token_counter), inputs=[toprow.prompt, steps], outputs=[toprow.token_counter])
-            toprow.negative_token_button.click(fn=wrap_queued_call(update_negative_prompt_token_counter), inputs=[toprow.negative_prompt, steps], outputs=[toprow.negative_token_counter])
+            toprow.ui_styles.dropdown.change(fn=wrap_queued_call(update_token_counter), inputs=[toprow.prompt, steps, toprow.ui_styles.dropdown], outputs=[toprow.token_counter])
+            toprow.ui_styles.dropdown.change(fn=wrap_queued_call(update_negative_prompt_token_counter), inputs=[toprow.negative_prompt, steps, toprow.ui_styles.dropdown], outputs=[toprow.negative_token_counter])
+            toprow.token_button.click(fn=wrap_queued_call(update_token_counter), inputs=[toprow.prompt, steps, toprow.ui_styles.dropdown], outputs=[toprow.token_counter])
+            toprow.negative_token_button.click(fn=wrap_queued_call(update_negative_prompt_token_counter), inputs=[toprow.negative_prompt, steps, toprow.ui_styles.dropdown], outputs=[toprow.negative_token_counter])
 
         extra_networks_ui = ui_extra_networks.create_ui(txt2img_interface, [txt2img_generation_tab], 'txt2img')
         ui_extra_networks.setup_ui(extra_networks_ui, output_panel.gallery)
@@ -830,8 +843,10 @@ def create_ui():
                 **interrogate_args,
             )
 
-            toprow.token_button.click(fn=update_token_counter, inputs=[toprow.prompt, steps], outputs=[toprow.token_counter])
-            toprow.negative_token_button.click(fn=wrap_queued_call(update_token_counter), inputs=[toprow.negative_prompt, steps], outputs=[toprow.negative_token_counter])
+            toprow.ui_styles.dropdown.change(fn=wrap_queued_call(update_token_counter), inputs=[toprow.prompt, steps, toprow.ui_styles.dropdown], outputs=[toprow.token_counter])
+            toprow.ui_styles.dropdown.change(fn=wrap_queued_call(update_negative_prompt_token_counter), inputs=[toprow.negative_prompt, steps, toprow.ui_styles.dropdown], outputs=[toprow.negative_token_counter])
+            toprow.token_button.click(fn=update_token_counter, inputs=[toprow.prompt, steps, toprow.ui_styles.dropdown], outputs=[toprow.token_counter])
+            toprow.negative_token_button.click(fn=wrap_queued_call(update_negative_prompt_token_counter), inputs=[toprow.negative_prompt, steps, toprow.ui_styles.dropdown], outputs=[toprow.negative_token_counter])
 
             img2img_paste_fields = [
                 (toprow.prompt, "Prompt"),
@@ -869,7 +884,7 @@ def create_ui():
         ui_postprocessing.create_ui()
 
     with gr.Blocks(analytics_enabled=False) as pnginfo_interface:
-        with gr.Row(equal_height=False):
+        with ResizeHandleRow(equal_height=False):
             with gr.Column(variant='panel'):
                 image = gr.Image(elem_id="pnginfo_image", label="Source", source="upload", interactive=True, type="pil")
 
@@ -897,7 +912,7 @@ def create_ui():
         with gr.Row(equal_height=False):
             gr.HTML(value="<p style='margin-bottom: 0.7em'>See <b><a href=\"https://github.com/AUTOMATIC1111/stable-diffusion-webui/wiki/Textual-Inversion\">wiki</a></b> for detailed explanation.</p>")
 
-        with gr.Row(variant="compact", equal_height=False):
+        with ResizeHandleRow(variant="compact", equal_height=False):
             with gr.Tabs(elem_id="train_tabs"):
 
                 with gr.Tab(label="Create embedding", id="create_embedding"):
diff --git a/modules/ui_tempdir.py b/modules/ui_tempdir.py
index 85015db5..91f40ea4 100644
--- a/modules/ui_tempdir.py
+++ b/modules/ui_tempdir.py
@@ -35,12 +35,7 @@ def save_pil_to_file(self, pil_image, dir=None, format="png"):
     already_saved_as = getattr(pil_image, 'already_saved_as', None)
     if already_saved_as and os.path.isfile(already_saved_as):
         register_tmp_file(shared.demo, already_saved_as)
-        filename = already_saved_as
-
-        if not shared.opts.save_images_add_number:
-            filename += f'?{os.path.getmtime(already_saved_as)}'
-
-        return filename
+        return f'{already_saved_as}?{os.path.getmtime(already_saved_as)}'
 
     if shared.opts.temp_dir != "":
         dir = shared.opts.temp_dir
diff --git a/modules/util.py b/modules/util.py
index ee373e92..8d1aea44 100644
--- a/modules/util.py
+++ b/modules/util.py
@@ -42,7 +42,7 @@ def walk_files(path, allowed_extensions=None):
         for filename in sorted(files, key=natural_sort_key):
             if allowed_extensions is not None:
                 _, ext = os.path.splitext(filename)
-                if ext not in allowed_extensions:
+                if ext.lower() not in allowed_extensions:
                     continue
 
             if not shared.opts.list_hidden_files and ("/." in root or "\\." in root):
diff --git a/style.css b/style.css
index 04b0a2fa..988c28c0 100644
--- a/style.css
+++ b/style.css
@@ -846,6 +846,20 @@ table.popup-table .link{
     display: inline-block;
 }
 
+/* extensions tab table row hover highlight */
+
+#extensions tr:hover td,
+#config_state_extensions tr:hover td,
+#available_extensions tr:hover td {
+    background: rgba(0, 0, 0, 0.15)
+}
+
+.dark #extensions tr:hover td ,
+.dark #config_state_extensions tr:hover td ,
+.dark #available_extensions tr:hover td {
+    background: rgba(255, 255, 255, 0.15)
+}
+
 /* replace original footer with ours */
 
 footer {
diff --git a/webui.sh b/webui.sh
index 25b94906..794cfb8a 100755
--- a/webui.sh
+++ b/webui.sh
@@ -226,30 +226,48 @@ fi
 # Try using TCMalloc on Linux
 prepare_tcmalloc() {
     if [[ "${OSTYPE}" == "linux"* ]] && [[ -z "${NO_TCMALLOC}" ]] && [[ -z "${LD_PRELOAD}" ]]; then
+        # check glibc version
+        LIBC_LIB="$(PATH=/usr/sbin:$PATH ldconfig -p | grep -P "libc.so.6" | head -n 1)"
+        LIBC_INFO=$(echo ${LIBC_LIB} | awk '{print $NF}')
+        LIBC_VER=$(echo $(${LIBC_INFO} | awk 'NR==1 {print $NF}') | grep -oP '\d+\.\d+')
+        echo "glibc version is $LIBC_VER"
+        libc_vernum=$(expr $LIBC_VER)
+        # Since 2.34 libpthread is integrated into libc.so
+        libc_v234=2.34
         # Define Tcmalloc Libs arrays
         TCMALLOC_LIBS=("libtcmalloc(_minimal|)\.so\.\d" "libtcmalloc\.so\.\d")
-
         # Traversal array
         for lib in "${TCMALLOC_LIBS[@]}"
         do
-          #Determine which type of tcmalloc library the library supports
-          TCMALLOC="$(PATH=/usr/sbin:$PATH ldconfig -p | grep -P $lib | head -n 1)"
-          TC_INFO=(${TCMALLOC//=>/})
-          if [[ ! -z "${TC_INFO}" ]]; then
-              echo "Using TCMalloc: ${TC_INFO}"
-              #Determine if the library is linked to libptthread and resolve undefined symbol: ptthread_Key_Create
-              if ldd ${TC_INFO[2]} | grep -q 'libpthread'; then
-                echo "$TC_INFO is linked with libpthread,execute LD_PRELOAD=${TC_INFO}"
-                export LD_PRELOAD="${TC_INFO}"
-                break
-              else
-                echo "$TC_INFO is not linked with libpthreadand will trigger undefined symbol: ptthread_Key_Create error"
-              fi
-          else
-              printf "\e[1m\e[31mCannot locate TCMalloc (improves CPU memory usage)\e[0m\n"
-          fi
+            # Determine which type of tcmalloc library the library supports
+            TCMALLOC="$(PATH=/usr/sbin:$PATH ldconfig -p | grep -P $lib | head -n 1)"
+            TC_INFO=(${TCMALLOC//=>/})
+            if [[ ! -z "${TC_INFO}" ]]; then
+                echo "Check TCMalloc: ${TC_INFO}"
+                # Determine if the library is linked to libptthread and resolve undefined symbol: ptthread_key_create
+                if [ $(echo "$libc_vernum < $libc_v234" | bc) -eq 1 ]; then
+                    # glibc < 2.33 pthread_key_create into libpthead.so. check linking libpthread.so...
+                    if ldd ${TC_INFO[2]} | grep -q 'libpthread'; then
+                        echo "$TC_INFO is linked with libpthread,execute LD_PRELOAD=${TC_INFO[2]}"
+                        # set fullpath LD_PRELOAD (To be on the safe side)
+                        export LD_PRELOAD="${TC_INFO[2]}"
+                        break
+                    else
+                        echo "$TC_INFO is not linked with libpthread will trigger undefined symbol: pthread_Key_create error"
+                    fi
+                else
+                    # Version 2.34 of libc.so (glibc) includes the pthead library IN GLIBC. (USE ubuntu 22.04 and modern linux system and WSL)
+                    # libc.so(glibc) is linked with a library that works in ALMOST ALL Linux userlands. SO NO CHECK!
+                    echo "$TC_INFO is linked with libc.so,execute LD_PRELOAD=${TC_INFO[2]}"
+                    # set fullpath LD_PRELOAD (To be on the safe side)
+                    export LD_PRELOAD="${TC_INFO[2]}"
+                    break
+                fi
+            fi
         done
-
+        if [[ -z "${LD_PRELOAD}" ]]; then
+            printf "\e[1m\e[31mCannot locate TCMalloc. Do you have tcmalloc or gperftools installed on your system? (improves CPU memory usage)\e[0m\n"
+        fi
     fi
 }