diff --git a/imperative/src/impl/interpreter/interpreter_impl.cpp b/imperative/src/impl/interpreter/interpreter_impl.cpp
index 5525dbce..01e636d9 100644
--- a/imperative/src/impl/interpreter/interpreter_impl.cpp
+++ b/imperative/src/impl/interpreter/interpreter_impl.cpp
@@ -847,7 +847,6 @@ void ChannelImpl::process_one_task(IdentifiedCommand& icmd) {
                         return "unknown";
                     }
                 };
-                InterpreterProfiler::dump_data(cmd.basename, cmd.format, records, profiler->get_option(), host_map);
             } else if constexpr (std::is_same_v<T, PushScope>) {
                 state.scopes.push_back(cmd.scope_name);
                 do_finish_command();
diff --git a/imperative/src/impl/interpreter/profiler.cpp b/imperative/src/impl/interpreter/profiler.cpp
index 5d294aec..ebf8cbc9 100644
--- a/imperative/src/impl/interpreter/profiler.cpp
+++ b/imperative/src/impl/interpreter/profiler.cpp
@@ -26,255 +26,5 @@
 
 namespace mgb::imperative::interpreter::intl {
 
-namespace {
-
-struct InterpreterProfilerDumpChromeTimelineContext {
-    // either host_thread(std::thread::id) or device_thread(CompNode)
-    using Thread = std::variant<std::thread::id, CompNode>;
-
-    // input params
-    std::string base_name;
-    std::string format;
-    InterpreterProfiler::Data profile_data;
-    InterpreterProfiler::Option option;
-    std::function<std::string(std::thread::id)> host_map;
-
-    // internal states
-    decltype(getpid()) pid;
-    CompNode::UnorderedMap<std::map<double, CompNode::Event*>> device_sync_map;
-    SmallVector<Thread> thread_list;
-    double time_start;
-    // options
-    bool show_operator_name;
-    // results
-    ChromeTraceEventList event_list;
-
-    InterpreterProfilerDumpChromeTimelineContext(
-            std::string base_name,
-            std::string format,
-            InterpreterProfiler::Data profile_data,
-            InterpreterProfiler::Option option,
-            std::function<std::string(std::thread::id)> host_map)
-        : base_name{base_name}, format{format}, profile_data{profile_data}, option{option}, host_map{host_map} {
-        pid = getpid();
-        time_start = option.align_time ? time_start : 0;
-        show_operator_name = option.show_operator_name;
-    }
-
-    // get device time from event
-    double get_device_time(CompNode::Event* device_event, double host_time) {
-        device_event->host_wait();
-        auto& sync_map = device_sync_map[device_event->comp_node()];
-        // find sync point
-        auto iter = sync_map.begin();
-        auto sync_current = [&] {
-            iter = sync_map.insert(iter, {host_time, device_event});
-            return host_time;
-        };
-        if (iter == sync_map.end()) {
-            // not found, insert sync
-            return sync_current();
-        }
-        auto& [base_time, base] = *iter;
-        // calculate elapsed time
-        double delta_time = base->elapsed_time_until(*device_event) * 1e3;
-        return base_time + delta_time;
-    };
-
-    template <typename T>
-    size_t get_tid(T t) {
-        for (size_t i = 0; i < thread_list.size(); i++) {
-            if (thread_list[i] == Thread{t}) {
-                return i;
-            }
-        }
-        thread_list.push_back(t);
-        return thread_list.size() - 1;
-    };
-
-    ChromeTraceEvent& new_event(std::string name, char ph, uint64_t tid, double ts) {
-        return event_list.new_event().name(name).ph(ph).tid(tid).ts(ts).pid(pid);
-    };
-
-    // convert Command to json object. Has to be an callable object
-    static auto constexpr cmd_to_args = [](const auto& cmd) {
-        auto args = json::Object::make();
-        cmd.get_props([&](const char* key, auto&& value){
-            (*args)[key] = json::String::make(to_string(value));
-        });
-        (*args)["__type__"] = json::String::make(typeid(cmd).name());
-        return args;
-    };
-
-    void process() {
-        // enumerate and process each record
-        for (auto& record: profile_data.records) {
-            std::visit([this](const auto& record){
-                using TEvent = std::decay_t<decltype(record.data)>;
-                Session<TEvent>(*this, record).process();
-            }, record);
-        }
-        for (size_t tid = 0; tid < thread_list.size(); ++tid) {
-            auto tname = std::visit([&](auto host_or_device) -> std::string{
-                using T = std::decay_t<decltype(host_or_device)>;
-                if constexpr (std::is_same_v<T, std::thread::id>) {
-                    // take name from host_map
-                    return host_map(host_or_device);
-                } else {
-                    // use CompNode::to_string
-                    return host_or_device.to_string();
-                }
-            }, thread_list[tid]);
-            // assign thread name
-            new_event("thread_name", 'M', tid, 0)
-                .arg("name", tname);
-        }
-        // wraite output to file
-        std::string out_buf;
-        event_list.to_json()->writeto(out_buf, 4);
-        std::ofstream output_stream;
-        output_stream.open(base_name + "." + format);
-        output_stream << out_buf;
-        output_stream.flush();
-        output_stream.close();
-    }
-
-    template <typename TEvent>
-    struct Session {
-        InterpreterProfilerDumpChromeTimelineContext& ctx;
-        const ProfilerBase::EventRecord<TEvent>& record;
-        const TEvent& data;
-
-        Session(InterpreterProfilerDumpChromeTimelineContext& ctx,
-                const ProfilerBase::EventRecord<TEvent>& record)
-            : ctx{ctx}, record{record}, data{record.data} {}
-
-        uint64_t get_host_tid() {
-            return ctx.get_tid(record.host().tid);
-        };
-        double get_host_ts() {
-            return (ctx.time_start + record.host().time) * 1e3;
-        };
-        uint64_t get_device_tid() {
-            return ctx.get_tid(record.device().event->comp_node());
-        };
-        double get_device_ts() {
-            return (ctx.time_start + ctx.get_device_time(record.device().event.get(), record.device().after)) * 1e3;
-        };
-        ChromeTraceEvent& new_host_event(std::string name, char ph) {
-            return ctx.new_event(std::move(name), ph, get_host_tid(), get_host_ts());
-        };
-        ChromeTraceEvent& new_device_event(std::string name, char ph) {
-            return ctx.new_event(std::move(name), ph, get_device_tid(), get_device_ts());
-        };
-
-        void process() {
-            // dispatch event by type
-            if constexpr (std::is_same_v<TEvent, CommandEnqueueEvent>) {
-                auto args = std::visit(cmd_to_args, data.icmd.second);
-                new_host_event("CommandEnqueue", 'X').dur(0).args(args);
-            } else if constexpr (std::is_same_v<TEvent, CommandExecuteEvent>) {
-                auto args = std::visit(cmd_to_args, data.icmd.second);
-                new_host_event("CommandExecute", 'B').args(args);
-            } else if constexpr (std::is_same_v<TEvent, CommandFinishEvent>) {
-                new_host_event("CommandExecute", 'E');
-            } else if constexpr (std::is_same_v<TEvent, HostOpExecuteEvent>) {
-                auto args = json::Object::make();
-                auto props = OpDef::props(*data.op);
-                auto name = data.op->trait()->name;
-                for (auto&& [prop_name, prop_val]: props) {
-                    (*args)[std::string("op.") + prop_name] = json::String::make(prop_val);
-                }
-                (*args)["name"] = json::String::make(name);
-                (*args)["id"] = json::Number::make(data.id);
-                (*args)["inputs"] = json::String::make(to_string(data.inputs));
-                (*args)["outputs"] = json::String::make(to_string(data.outputs));
-                new_host_event(ctx.show_operator_name ? name : "OpExecute", 'B').args(args);
-            } else if constexpr (std::is_same_v<TEvent, DeviceOpExecuteEvent>) {
-                auto args = json::Object::make();
-                auto props = OpDef::props(*data.op);
-                auto name = data.op->trait()->name;
-                for (auto&& [prop_name, prop_val]: props) {
-                    (*args)[std::string("op.") + prop_name] = json::String::make(prop_val);
-                }
-                (*args)["name"] = json::String::make(name);
-                (*args)["id"] = json::Number::make(data.id);
-                (*args)["inputs"] = json::String::make(to_string(data.inputs));
-                (*args)["outputs"] = json::String::make(to_string(data.outputs));
-                new_device_event(ctx.show_operator_name ? name : "OpExecute", 'B').args(args);
-            } else if constexpr (std::is_same_v<TEvent, HostOpFinishEvent>) {
-                auto name = data.op->trait()->name;
-                new_host_event(ctx.show_operator_name ? name : "OpExecute", 'E');
-            } else if constexpr (std::is_same_v<TEvent, DeviceOpFinishEvent>) {
-                auto name = data.op->trait()->name;
-                new_device_event(ctx.show_operator_name ? name : "OpExecute", 'E');
-            } else if constexpr (std::is_same_v<TEvent, TensorDeclareEvent>) {
-                json::Number::make(data.tensor_id);
-                new_host_event("TensorLifetime", 'N').id(data.tensor_id);
-            } else if constexpr (std::is_same_v<TEvent, TensorProduceEvent>) {
-                auto snapshot = json::Object::make();
-                (*snapshot)["shape"] = json::String::make(to_string((TensorShape)data.layout));
-                (*snapshot)["dtype"] = json::String::make(to_string(data.layout.dtype));
-                (*snapshot)["device"] = json::String::make(to_string(data.device));
-                json::Number::make(data.tensor_id);
-                new_host_event("TensorLifetime", 'O').id(data.tensor_id).arg("snapshot", snapshot);
-            } else if constexpr (std::is_same_v<TEvent, TensorEraseEvent>) {
-                json::Number::make(data.tensor_id);
-                new_host_event("TensorLifetime", 'D').id(data.tensor_id);
-            } else if constexpr (std::is_same_v<TEvent, TensorGetPropEvent>) {
-                auto args = json::Object::make();
-                (*args)["id"] = json::Number::make(data.tensor_id);
-                (*args)["prop"] = json::String::make(to_string(data.prop));
-                (*args)["prop_desc"] = json::String::make(data.prop_desc);
-                new_host_event("TensorGetProp", 'X').dur(0).args(args);
-            } else if constexpr (std::is_same_v<TEvent, TensorNotifyPropEvent>) {
-                // TODO
-            } else if constexpr (std::is_same_v<TEvent, TensorWaitPropEvent>) {
-                auto args = json::Object::make();
-                (*args)["id"] = json::Number::make(data.tensor_id);
-                (*args)["prop"] = json::String::make(to_string(data.prop));
-                (*args)["prop_desc"] = json::String::make(data.prop_desc);
-                new_host_event("TensorWaitProp", 'B').args(args);
-            } else if constexpr (std::is_same_v<TEvent, TensorWaitPropFinishEvent>) {
-                auto args = json::Object::make();
-                (*args)["id"] = json::Number::make(data.tensor_id);
-                (*args)["prop"] = json::String::make(to_string(data.prop));
-                (*args)["prop_desc"] = json::String::make(data.prop_desc);
-                new_host_event("TensorWaitProp", 'E').args(args);
-            } else if constexpr (std::is_same_v<TEvent, SyncStartEvent>) {
-                new_host_event("SyncEvent", 'B');
-            } else if constexpr (std::is_same_v<TEvent, SyncFinishEvent>) {
-                new_host_event("SyncEvent", 'E');
-            } else if constexpr (std::is_same_v<TEvent, ChannelBeginScope>) {
-                new_host_event(data.name, 'B');
-            } else if constexpr (std::is_same_v<TEvent, ChannelEndScope>) {
-                new_host_event(data.name, 'E');
-            } else if constexpr (std::is_same_v<TEvent, WorkerBeginScope>) {
-                new_host_event(data.name, 'B');
-            } else if constexpr (std::is_same_v<TEvent, WorkerEndScope>) {
-                new_host_event(data.name, 'E');
-            } else if constexpr (std::is_same_v<TEvent, DeviceBeginScope>) {
-                new_device_event(data.name, 'B');
-            } else if constexpr (std::is_same_v<TEvent, DeviceEndScope>) {
-                new_device_event(data.name, 'E');
-            } else {
-                static_assert(!std::is_same_v<TEvent, TEvent>);
-            }
-        }
-    };
-};
-
-}
-
-void InterpreterProfiler::dump_data(
-        std::string basename,
-        std::string format,
-        InterpreterProfiler::Data profile_data,
-        const InterpreterProfiler::Option& option,
-        std::function<std::string(std::thread::id)> host_map) {
-    InterpreterProfilerDumpChromeTimelineContext{
-        basename, format, profile_data, option, host_map
-    }.process();
-}
 
 }
diff --git a/imperative/src/impl/interpreter/profiler.h b/imperative/src/impl/interpreter/profiler.h
index 58347537..538a3540 100644
--- a/imperative/src/impl/interpreter/profiler.h
+++ b/imperative/src/impl/interpreter/profiler.h
@@ -61,8 +61,6 @@ public:
         m_option = option;
     }
 
-    static void dump_data(std::string basename, std::string format, InterpreterProfiler::Data profile_data, const Option& option, std::function<std::string(std::thread::id)> host_map);
-
     static Mask topic_to_mask(Topic topic) {
         Mask result;
         if (topic & Command) {
diff --git a/imperative/src/impl/profiler/chrome_timeline.cpp b/imperative/src/impl/profiler/chrome_timeline.cpp
new file mode 100644
index 00000000..956ae90b
--- /dev/null
+++ b/imperative/src/impl/profiler/chrome_timeline.cpp
@@ -0,0 +1,145 @@
+#include <string>
+#include <memory>
+#include "megbrain/utils/json.h"
+
+namespace mgb {
+namespace imperative {
+
+class ChromeTraceEvent {
+public:
+    ChromeTraceEvent& name(std::string name) {
+        m_name = std::move(name);
+        return *this;
+    }
+    ChromeTraceEvent& tid(uint64_t tid) {
+        m_tid = std::move(tid);
+        return *this;
+    }
+    ChromeTraceEvent& cat(std::string cat) {
+        m_cat = std::move(cat);
+        return *this;
+    }
+    ChromeTraceEvent& pid(uint64_t pid) {
+        m_pid = pid;
+        return *this;
+    }
+    ChromeTraceEvent& id(uint64_t id) {
+        m_id = id;
+        return *this;
+    }
+    ChromeTraceEvent& idx(uint64_t idx) {
+        m_idx = idx;
+        return *this;
+    }
+    ChromeTraceEvent& ts(double ts) {
+        m_ts = ts;
+        return *this;
+    }
+    ChromeTraceEvent& dur(double dur) {
+        m_dur = dur;
+        return *this;
+    }
+    ChromeTraceEvent& ph(char ph) {
+        m_ph = ph;
+        return *this;
+    }
+    ChromeTraceEvent& bp(char bp) {
+        m_bp = bp;
+        return *this;
+    }
+    ChromeTraceEvent& args(std::shared_ptr<json::Object> args) {
+        m_args = std::move(args);
+        return *this;
+    }
+    ChromeTraceEvent& arg(std::string key, std::string value) {
+        if (!m_args) {
+            m_args = json::Object::make();
+        }
+        (*m_args)[key] = json::String::make(value);
+        return *this;
+    }
+    ChromeTraceEvent& arg(std::string key, double value) {
+        if (!m_args) {
+            m_args = json::Object::make();
+        }
+        (*m_args)[key] = json::Number::make(value);
+        return *this;
+    }
+    ChromeTraceEvent& arg(std::string key, std::shared_ptr<json::Value> value) {
+        if (!m_args) {
+            m_args = json::Object::make();
+        }
+        (*m_args)[key] = value;
+        return *this;
+    }
+
+    std::shared_ptr<json::Object> to_json() const {
+        auto result = json::Object::make();
+        auto prop_str = [&](auto key, auto value) {
+            if (value.empty()) {
+                return;
+            }
+            (*result)[key] = json::String::make(value);
+        };
+        auto prop_num = [&](auto key, auto value) {
+            if (!value) {
+                return;
+            }
+            (*result)[key] = json::Number::make(value.value());
+        };
+        auto prop_char = [&](auto key, auto value) {
+            if (!value) {
+                return;
+            }
+            (*result)[key] = json::String::make(std::string{} + value.value());
+        };
+        prop_str("name", m_name);
+        prop_num("tid", m_tid);
+        prop_str("cat", m_cat);
+        prop_num("pid", m_pid);
+        prop_num("id", m_id);
+        prop_num("idx", m_idx);
+        prop_num("ts", m_ts);
+        prop_num("dur", m_dur);
+        prop_char("ph", m_ph);
+        prop_char("bp", m_bp);
+        if (m_args) {
+            (*result)["args"] = m_args;
+        }
+        return result;
+    }
+private:
+    std::string m_name;
+    std::string m_cat;
+
+    std::optional<uint64_t> m_tid;
+    std::optional<uint64_t> m_pid;
+    std::optional<uint64_t> m_id;
+    std::optional<uint64_t> m_idx;
+    std::optional<double> m_ts;
+    std::optional<double> m_dur;
+    std::optional<char> m_ph;
+    std::optional<char> m_bp;
+    std::shared_ptr<json::Object> m_args;
+};
+
+class ChromeTraceEventList {
+public:
+    ChromeTraceEvent& new_event() {
+        m_content.emplace_back();
+        return m_content.back();
+    }
+
+    std::shared_ptr<json::Array> to_json() const {
+        auto result = json::Array::make();
+        for (auto&& event: m_content) {
+            result->add(event.to_json());
+        }
+        return result;
+    }
+private:
+    std::vector<ChromeTraceEvent> m_content;
+};
+
+}  // namespace imperative
+}  // namespace mgb
diff --git a/imperative/src/include/megbrain/imperative/profiler.h b/imperative/src/include/megbrain/imperative/profiler.h
index b092f604..9d2f5165 100644
--- a/imperative/src/include/megbrain/imperative/profiler.h
+++ b/imperative/src/include/megbrain/imperative/profiler.h
@@ -190,142 +190,5 @@ protected:
     std::atomic<Status> m_status = NotStarted;
 };
 
-
-class ChromeTraceEvent {
-public:
-    ChromeTraceEvent& name(std::string name) {
-        m_name = std::move(name);
-        return *this;
-    }
-    ChromeTraceEvent& tid(uint64_t tid) {
-        m_tid = std::move(tid);
-        return *this;
-    }
-    ChromeTraceEvent& cat(std::string cat) {
-        m_cat = std::move(cat);
-        return *this;
-    }
-    ChromeTraceEvent& pid(uint64_t pid) {
-        m_pid = pid;
-        return *this;
-    }
-    ChromeTraceEvent& id(uint64_t id) {
-        m_id = id;
-        return *this;
-    }
-    ChromeTraceEvent& idx(uint64_t idx) {
-        m_idx = idx;
-        return *this;
-    }
-    ChromeTraceEvent& ts(double ts) {
-        m_ts = ts;
-        return *this;
-    }
-    ChromeTraceEvent& dur(double dur) {
-        m_dur = dur;
-        return *this;
-    }
-    ChromeTraceEvent& ph(char ph) {
-        m_ph = ph;
-        return *this;
-    }
-    ChromeTraceEvent& bp(char bp) {
-        m_bp = bp;
-        return *this;
-    }
-    ChromeTraceEvent& args(std::shared_ptr<json::Object> args) {
-        m_args = std::move(args);
-        return *this;
-    }
-    ChromeTraceEvent& arg(std::string key, std::string value) {
-        if (!m_args) {
-            m_args = json::Object::make();
-        }
-        (*m_args)[key] = json::String::make(value);
-        return *this;
-    }
-    ChromeTraceEvent& arg(std::string key, double value) {
-        if (!m_args) {
-            m_args = json::Object::make();
-        }
-        (*m_args)[key] = json::Number::make(value);
-        return *this;
-    }
-    ChromeTraceEvent& arg(std::string key, std::shared_ptr<json::Value> value) {
-        if (!m_args) {
-            m_args = json::Object::make();
-        }
-        (*m_args)[key] = value;
-        return *this;
-    }
-
-    std::shared_ptr<json::Object> to_json() const {
-        auto result = json::Object::make();
-        auto prop_str = [&](auto key, auto value) {
-            if (value.empty()) {
-                return;
-            }
-            (*result)[key] = json::String::make(value);
-        };
-        auto prop_num = [&](auto key, auto value) {
-            if (!value) {
-                return;
-            }
-            (*result)[key] = json::Number::make(value.value());
-        };
-        auto prop_char = [&](auto key, auto value) {
-            if (!value) {
-                return;
-            }
-            (*result)[key] = json::String::make(std::string{} + value.value());
-        };
-        prop_str("name", m_name);
-        prop_num("tid", m_tid);
-        prop_str("cat", m_cat);
-        prop_num("pid", m_pid);
-        prop_num("id", m_id);
-        prop_num("idx", m_idx);
-        prop_num("ts", m_ts);
-        prop_num("dur", m_dur);
-        prop_char("ph", m_ph);
-        prop_char("bp", m_bp);
-        if (m_args) {
-            (*result)["args"] = m_args;
-        }
-        return result;
-    }
-private:
-    std::string m_name;
-    std::string m_cat;
-
-    std::optional<uint64_t> m_tid;
-    std::optional<uint64_t> m_pid;
-    std::optional<uint64_t> m_id;
-    std::optional<uint64_t> m_idx;
-    std::optional<double> m_ts;
-    std::optional<double> m_dur;
-    std::optional<char> m_ph;
-    std::optional<char> m_bp;
-    std::shared_ptr<json::Object> m_args;
-};
-
-class ChromeTraceEventList {
-public:
-    ChromeTraceEvent& new_event() {
-        m_content.emplace_back();
-        return m_content.back();
-    }
-
-    std::shared_ptr<json::Array> to_json() const {
-        auto result = json::Array::make();
-        for (auto&& event: m_content) {
-            result->add(event.to_json());
-        }
-        return result;
-    }
-private:
-    std::vector<ChromeTraceEvent> m_content;
-};
-
 }  // namespace imperative
 }  // namespace mgb