diff --git a/.gitmodules b/.gitmodules
index f0c27341..fbe945c5 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -4,6 +4,3 @@
 [submodule "third_party/doctest"]
 	path = third_party/doctest
 	url = https://github.com/onqtam/doctest
-[submodule "third_party/loguru"]
-	path = third_party/loguru
-	url = https://github.com/emilk/loguru
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 05aa3e0b..f3bdd59f 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -201,14 +201,15 @@ target_sources(ccls PRIVATE
                src/filesystem.cc
                src/fuzzy_match.cc
                src/main.cc
-               src/import_pipeline.cc
                src/include_complete.cc
                src/method.cc
                src/language.cc
                src/lex_utils.cc
+               src/log.cc
                src/lsp.cc
                src/match.cc
                src/message_handler.cc
+               src/pipeline.cc
                src/platform_posix.cc
                src/platform_win.cc
                src/port.cc
diff --git a/src/cache_manager.cc b/src/cache_manager.cc
index 79a159a4..c3e64788 100644
--- a/src/cache_manager.cc
+++ b/src/cache_manager.cc
@@ -5,8 +5,6 @@
 #include "lsp.h"
 #include "platform.h"
 
-#include <loguru/loguru.hpp>
-
 #include <algorithm>
 #include <unordered_map>
 
diff --git a/src/clang_complete.cc b/src/clang_complete.cc
index 6d344da0..e06c7647 100644
--- a/src/clang_complete.cc
+++ b/src/clang_complete.cc
@@ -1,14 +1,15 @@
 #include "clang_complete.h"
 
 #include "clang_utils.h"
+#include "filesystem.hh"
+#include "log.hh"
 #include "platform.h"
 #include "timer.h"
 
-#include "filesystem.hh"
+#include <llvm/ADT/Twine.h>
+#include <llvm/Support/Threading.h>
 using namespace llvm;
 
-#include <loguru.hpp>
-
 #include <algorithm>
 #include <thread>
 
@@ -660,15 +661,15 @@ ClangCompleteManager::ClangCompleteManager(Project* project,
       preloaded_sessions_(kMaxPreloadedSessions),
       completion_sessions_(kMaxCompletionSessions) {
   std::thread([&]() {
-    SetThreadName("comp-query");
+    set_thread_name("comp-query");
     CompletionQueryMain(this);
   }).detach();
   std::thread([&]() {
-    SetThreadName("comp-preload");
+    set_thread_name("comp-preload");
     CompletionPreloadMain(this);
   }).detach();
   std::thread([&]() {
-    SetThreadName("diag-query");
+    set_thread_name("diag-query");
     DiagnosticQueryMain(this);
   }).detach();
 }
@@ -803,10 +804,11 @@ void ClangCompleteManager::FlushSession(const std::string& filename) {
 }
 
 void ClangCompleteManager::FlushAllSessions() {
-	std::lock_guard<std::mutex> lock(sessions_lock_);
+  LOG_S(INFO) << "flush all clang complete sessions";
+  std::lock_guard<std::mutex> lock(sessions_lock_);
 
-	preloaded_sessions_.Clear();
-	completion_sessions_.Clear();
+  preloaded_sessions_.Clear();
+  completion_sessions_.Clear();
 }
 
 void CodeCompleteCache::WithLock(std::function<void()> action) {
diff --git a/src/clang_indexer.cc b/src/clang_indexer.cc
index 405d91b4..a9d66986 100644
--- a/src/clang_indexer.cc
+++ b/src/clang_indexer.cc
@@ -2,13 +2,12 @@
 
 #include "clang_cursor.h"
 #include "clang_utils.h"
+#include "log.hh"
 #include "platform.h"
 #include "serializer.h"
 #include "timer.h"
 #include "type_printer.h"
 
-#include <loguru.hpp>
-
 #include <assert.h>
 #include <inttypes.h>
 #include <limits.h>
diff --git a/src/clang_translation_unit.cc b/src/clang_translation_unit.cc
index ffca1b0b..f9f9aaf4 100644
--- a/src/clang_translation_unit.cc
+++ b/src/clang_translation_unit.cc
@@ -1,11 +1,10 @@
 #include "clang_translation_unit.h"
 
 #include "clang_utils.h"
+#include "log.hh"
 #include "platform.h"
 #include "utils.h"
 
-#include <loguru.hpp>
-
 namespace {
 
 void EmitDiagnostics(std::string path,
diff --git a/src/file_consumer.cc b/src/file_consumer.cc
index 5db6afca..218ec3bf 100644
--- a/src/file_consumer.cc
+++ b/src/file_consumer.cc
@@ -2,11 +2,10 @@
 
 #include "clang_utils.h"
 #include "indexer.h"
+#include "log.hh"
 #include "platform.h"
 #include "utils.h"
 
-#include <loguru.hpp>
-
 namespace {
 
 std::optional<std::string> GetFileContents(
@@ -108,8 +107,8 @@ IndexFile* FileConsumer::TryConsumeFile(
   if (clang_getFileUniqueID(file, &file_id) != 0) {
     std::string file_name = FileName(file);
     if (!file_name.empty()) {
-      // LOG_S(ERROR) << "Could not get unique file id for " << file_name
-      // << " when parsing " << parse_file_;
+      LOG_S(ERROR) << "Could not get unique file id for " << file_name
+                   << " when parsing " << parse_file_;
     }
     return nullptr;
   }
diff --git a/src/include_complete.cc b/src/include_complete.cc
index ea33fa33..1d1b74a1 100644
--- a/src/include_complete.cc
+++ b/src/include_complete.cc
@@ -6,6 +6,10 @@
 #include "project.h"
 #include "timer.h"
 
+#include <llvm/ADT/Twine.h>
+#include <llvm/Support/Threading.h>
+using namespace llvm;
+
 #include <thread>
 
 namespace {
@@ -103,7 +107,7 @@ void IncludeComplete::Rescan() {
 
   is_scanning = true;
   std::thread([this]() {
-    SetThreadName("scan_includes");
+    set_thread_name("scan_includes");
     Timer timer;
 
     for (const std::string& dir : project_->quote_include_directories)
diff --git a/src/log.cc b/src/log.cc
new file mode 100644
index 00000000..573f9184
--- /dev/null
+++ b/src/log.cc
@@ -0,0 +1,62 @@
+#include "log.hh"
+
+#include <llvm/ADT/SmallString.h>
+#include <llvm/Support/Threading.h>
+
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+#include <iomanip>
+#include <mutex>
+
+namespace ccls::log {
+static std::mutex mtx;
+FILE* file;
+Verbosity verbosity;
+
+Message::Message(Verbosity verbosity, const char* file, int line)
+    : verbosity_(verbosity) {
+  using namespace llvm;
+  time_t tim = time(NULL);
+  struct tm t;
+  {
+    std::lock_guard<std::mutex> lock(mtx);
+    t = *localtime(&tim);
+  }
+  char buf[16];
+  snprintf(buf, sizeof buf, "%02d:%02d:%02d ", t.tm_hour, t.tm_min, t.tm_sec);
+  stream_ << buf;
+  {
+    SmallString<32> Name;
+    get_thread_name(Name);
+    stream_ << std::left << std::setw(13) << Name.c_str();
+  }
+  {
+    const char* p = strrchr(file, '/');
+    if (p)
+      file = p + 1;
+    stream_ << std::right << std::setw(15) << file << ':' << std::left
+            << std::setw(3) << line;
+  }
+  stream_ << ' ';
+  // clang-format off
+  switch (verbosity_) {
+    case Verbosity_FATAL: stream_ << 'F'; break;
+    case Verbosity_ERROR: stream_ << 'E'; break;
+    case Verbosity_WARNING: stream_ << 'W'; break;
+    case Verbosity_INFO: stream_ << 'I'; break;
+    default: stream_ << "V(" << int(verbosity_) << ')';
+  }
+  // clang-format on
+  stream_ << ' ';
+}
+
+Message::~Message() {
+  if (!file) return;
+  std::lock_guard<std::mutex> lock(mtx);
+  stream_ << '\n';
+  fputs(stream_.str().c_str(), file);
+  if (verbosity_ == Verbosity_FATAL)
+    abort();
+}
+}
diff --git a/src/log.hh b/src/log.hh
new file mode 100644
index 00000000..caab8151
--- /dev/null
+++ b/src/log.hh
@@ -0,0 +1,40 @@
+#pragma once
+
+#include <stdio.h>
+#include <sstream>
+
+namespace ccls::log {
+extern FILE* file;
+
+struct Voidify {
+  void operator&(const std::ostream&) {}
+};
+
+enum Verbosity {
+  Verbosity_FATAL = -3,
+  Verbosity_ERROR = -2,
+  Verbosity_WARNING = -1,
+  Verbosity_INFO = 0,
+};
+extern Verbosity verbosity;
+
+struct Message {
+  std::stringstream stream_;
+  int verbosity_;
+
+  Message(Verbosity verbosity, const char* file, int line);
+  ~Message();
+};
+}
+
+#define LOG_IF(v, cond)            \
+  !(cond) ? void(0)                \
+          : ccls::log::Voidify() & \
+                ccls::log::Message(v, __FILE__, __LINE__).stream_
+#define LOG_S(v)                   \
+  LOG_IF(ccls::log::Verbosity_##v, \
+         ccls::log::Verbosity_##v <= ccls::log::verbosity)
+#define LOG_IF_S(v, cond)          \
+  LOG_IF(ccls::log::Verbosity_##v, \
+         (cond) && ccls::log::Verbosity_##v <= ccls::log::verbosity)
+#define CHECK_S(cond) LOG_IF(FATAL, !(cond)) << "check failed: " #cond " "
diff --git a/src/lsp.cc b/src/lsp.cc
index 9b11ac76..2968c399 100644
--- a/src/lsp.cc
+++ b/src/lsp.cc
@@ -1,10 +1,9 @@
 #include "lsp.h"
 
+#include "log.hh"
 #include "serializers/json.h"
 
-#include <doctest/doctest.h>
 #include <rapidjson/writer.h>
-#include <loguru.hpp>
 
 #include <stdio.h>
 
@@ -68,45 +67,6 @@ std::optional<std::string> ReadJsonRpcContentFrom(
   return content;
 }
 
-std::function<std::optional<char>()> MakeContentReader(std::string* content,
-                                                  bool can_be_empty) {
-  return [content, can_be_empty]() -> std::optional<char> {
-    if (!can_be_empty)
-      REQUIRE(!content->empty());
-    if (content->empty())
-      return std::nullopt;
-    char c = (*content)[0];
-    content->erase(content->begin());
-    return c;
-  };
-}
-
-TEST_SUITE("FindIncludeLine") {
-  TEST_CASE("ReadContentFromSource") {
-    auto parse_correct = [](std::string content) -> std::string {
-      auto reader = MakeContentReader(&content, false /*can_be_empty*/);
-      auto got = ReadJsonRpcContentFrom(reader);
-      REQUIRE(got);
-      return got.value();
-    };
-
-    auto parse_incorrect = [](std::string content) -> std::optional<std::string> {
-      auto reader = MakeContentReader(&content, true /*can_be_empty*/);
-      return ReadJsonRpcContentFrom(reader);
-    };
-
-    REQUIRE(parse_correct("Content-Length: 0\r\n\r\n") == "");
-    REQUIRE(parse_correct("Content-Length: 1\r\n\r\na") == "a");
-    REQUIRE(parse_correct("Content-Length: 4\r\n\r\nabcd") == "abcd");
-
-    REQUIRE(parse_incorrect("ggg") == std::optional<std::string>());
-    REQUIRE(parse_incorrect("Content-Length: 0\r\n") ==
-            std::optional<std::string>());
-    REQUIRE(parse_incorrect("Content-Length: 5\r\n\r\nab") ==
-            std::optional<std::string>());
-  }
-}
-
 std::optional<char> ReadCharFromStdinBlocking() {
   // We do not use std::cin because it does not read bytes once stuck in
   // cin.bad(). We can call cin.clear() but C++ iostream has other annoyance
diff --git a/src/lsp.h b/src/lsp.h
index a72410b6..84fbf2e1 100644
--- a/src/lsp.h
+++ b/src/lsp.h
@@ -304,14 +304,6 @@ struct lsWorkspaceEdit {
 };
 MAKE_REFLECT_STRUCT(lsWorkspaceEdit, documentChanges);
 
-struct lsFormattingOptions {
-  // Size of a tab in spaces.
-  int tabSize;
-  // Prefer spaces over tabs.
-  bool insertSpaces;
-};
-MAKE_REFLECT_STRUCT(lsFormattingOptions, tabSize, insertSpaces);
-
 // MarkedString can be used to render human readable text. It is either a
 // markdown string or a code-block that provides a language and a code snippet.
 // The language identifier is sematically equal to the std::optional language
diff --git a/src/main.cc b/src/main.cc
index 503b1e12..fcfc66e9 100644
--- a/src/main.cc
+++ b/src/main.cc
@@ -1,4 +1,5 @@
-#include "import_pipeline.h"
+#include "log.hh"
+#include "pipeline.hh"
 #include "platform.h"
 #include "serializer.h"
 #include "serializers/json.h"
@@ -7,12 +8,12 @@
 
 #include <llvm/Support/CommandLine.h>
 #include <llvm/Support/Process.h>
+#include <llvm/Support/Signals.h>
 using namespace llvm;
 using namespace llvm::cl;
 
 #include <doctest/doctest.h>
 #include <rapidjson/error/en.h>
-#include <loguru.hpp>
 
 #include <stdio.h>
 #include <stdlib.h>
@@ -34,10 +35,15 @@ opt<std::string> opt_log_file_append("log-file-append", desc("log"), value_desc(
 
 list<std::string> opt_extra(Positional, ZeroOrMore, desc("extra"));
 
+void CloseLog() {
+  fclose(ccls::log::file);
+}
+
 }  // namespace
 
 int main(int argc, char** argv) {
   TraceMe();
+  sys::PrintStackTraceOnErrorSignal(argv[0]);
 
   ParseCommandLineOptions(argc, argv,
                           "C/C++/Objective-C language server\n\n"
@@ -50,13 +56,6 @@ int main(int argc, char** argv) {
       return 0;
   }
 
-  loguru::g_stderr_verbosity = opt_verbose - 1;
-  loguru::g_preamble_date = false;
-  loguru::g_preamble_time = false;
-  loguru::g_preamble_verbose = false;
-  loguru::g_flush_interval_ms = 0;
-  loguru::init(argc, argv);
-
   MultiQueueWaiter querydb_waiter, indexer_waiter, stdout_waiter;
   QueueManager::Init(&querydb_waiter, &indexer_waiter, &stdout_waiter);
 
@@ -72,10 +71,19 @@ int main(int argc, char** argv) {
 
   bool language_server = true;
 
-  if (opt_log_file.size())
-    loguru::add_file(opt_log_file.c_str(), loguru::Truncate, opt_verbose);
-  if (opt_log_file_append.size())
-    loguru::add_file(opt_log_file_append.c_str(), loguru::Append, opt_verbose);
+  if (opt_log_file.size() || opt_log_file_append.size()) {
+    ccls::log::file = opt_log_file.size()
+                          ? fopen(opt_log_file.c_str(), "wb")
+                          : fopen(opt_log_file_append.c_str(), "ab");
+    if (!ccls::log::file) {
+      fprintf(
+          stderr, "failed to open %s\n",
+          (opt_log_file.size() ? opt_log_file : opt_log_file_append).c_str());
+      return 2;
+    }
+    setbuf(ccls::log::file, NULL);
+    atexit(CloseLog);
+  }
 
   if (opt_test_unit) {
     language_server = false;
diff --git a/src/message_handler.cc b/src/message_handler.cc
index cf17c013..a0014c21 100644
--- a/src/message_handler.cc
+++ b/src/message_handler.cc
@@ -1,12 +1,11 @@
 #include "message_handler.h"
 
 #include "lex_utils.h"
+#include "log.hh"
 #include "project.h"
 #include "query_utils.h"
 #include "queue_manager.h"
 
-#include <loguru.hpp>
-
 #include <algorithm>
 
 MAKE_HASHABLE(SymbolIdx, t.usr, t.kind);
@@ -156,14 +155,7 @@ bool FindFileOrFail(QueryDatabase* db,
   if (indexing)
     LOG_S(INFO) << "\"" << absolute_path << "\" is being indexed.";
   else
-    LOG_S(INFO) << "Unable to find file \"" << absolute_path << "\"";
-  /*
-  LOG_S(INFO) << "Files (size=" << db->usr_to_file.size() << "): "
-              << StringJoinMap(db->usr_to_file,
-                               [](const std::pair<NormalizedPath, QueryFileId>& entry) {
-                                 return entry.first.path;
-                               });
-  */
+    LOG_S(INFO) << "unable to find file \"" << absolute_path << "\"";
 
   if (id) {
     Out_Error out;
diff --git a/src/messages/ccls_call_hierarchy.cc b/src/messages/ccls_call_hierarchy.cc
index c15e1122..08c94515 100644
--- a/src/messages/ccls_call_hierarchy.cc
+++ b/src/messages/ccls_call_hierarchy.cc
@@ -2,8 +2,6 @@
 #include "query_utils.h"
 #include "queue_manager.h"
 
-#include <loguru.hpp>
-
 #include <unordered_set>
 
 namespace {
diff --git a/src/messages/ccls_freshen_index.cc b/src/messages/ccls_freshen_index.cc
index f9e047fa..bf36450f 100644
--- a/src/messages/ccls_freshen_index.cc
+++ b/src/messages/ccls_freshen_index.cc
@@ -1,14 +1,13 @@
 #include "cache_manager.h"
-#include "import_pipeline.h"
 #include "match.h"
 #include "message_handler.h"
+#include "pipeline.hh"
 #include "platform.h"
 #include "project.h"
 #include "queue_manager.h"
 #include "timer.h"
 #include "working_files.h"
 
-#include <loguru.hpp>
 #include <queue>
 #include <unordered_set>
 
diff --git a/src/messages/exit.cc b/src/messages/exit.cc
index 2722dca5..edf0c4ff 100644
--- a/src/messages/exit.cc
+++ b/src/messages/exit.cc
@@ -1,7 +1,5 @@
 #include "message_handler.h"
 
-#include <loguru.hpp>
-
 namespace {
 struct In_Exit : public NotificationInMessage {
   MethodType GetMethodType() const override { return kMethodType_Exit; }
@@ -13,7 +11,6 @@ struct Handler_Exit : MessageHandler {
   MethodType GetMethodType() const override { return kMethodType_Exit; }
 
   void Run(std::unique_ptr<InMessage> request) override {
-    LOG_S(INFO) << "Exiting; got exit message";
     exit(0);
   }
 };
diff --git a/src/messages/initialize.cc b/src/messages/initialize.cc
index fc4bc4d9..d15ba2e2 100644
--- a/src/messages/initialize.cc
+++ b/src/messages/initialize.cc
@@ -1,8 +1,10 @@
 #include "cache_manager.h"
 #include "diagnostics_engine.h"
-#include "import_pipeline.h"
+#include "filesystem.hh"
 #include "include_complete.h"
+#include "log.hh"
 #include "message_handler.h"
+#include "pipeline.hh"
 #include "platform.h"
 #include "project.h"
 #include "queue_manager.h"
@@ -10,11 +12,10 @@
 #include "timer.h"
 #include "working_files.h"
 
-#include "filesystem.hh"
+#include <llvm/ADT/Twine.h>
+#include <llvm/Support/Threading.h>
 using namespace llvm;
 
-#include <loguru.hpp>
-
 #include <iostream>
 #include <stdexcept>
 #include <thread>
@@ -508,12 +509,12 @@ struct Handler_Initialize : BaseMessageHandler<In_InitializeRequest> {
     if (g_config->index.threads == 0)
       g_config->index.threads = std::thread::hardware_concurrency();
 
-    LOG_S(INFO) << "Starting " << g_config->index.threads << " indexers";
+    LOG_S(INFO) << "start " << g_config->index.threads << " indexers";
     for (int i = 0; i < g_config->index.threads; i++) {
       std::thread([=]() {
         g_thread_id = i + 1;
         std::string name = "indexer" + std::to_string(i);
-        SetThreadName(name.c_str());
+        set_thread_name(name.c_str());
         Indexer_Main(diag_engine, vfs, project, working_files, waiter);
       }).detach();
     }
diff --git a/src/messages/text_document_completion.cc b/src/messages/text_document_completion.cc
index a0820549..1f536a40 100644
--- a/src/messages/text_document_completion.cc
+++ b/src/messages/text_document_completion.cc
@@ -8,8 +8,6 @@
 
 #include "lex_utils.h"
 
-#include <loguru.hpp>
-
 #include <regex>
 
 namespace {
diff --git a/src/messages/text_document_did_change.cc b/src/messages/text_document_did_change.cc
index b09b1829..8072cb95 100644
--- a/src/messages/text_document_did_change.cc
+++ b/src/messages/text_document_did_change.cc
@@ -5,8 +5,6 @@
 #include "working_files.h"
 #include "queue_manager.h"
 
-#include <loguru/loguru.hpp>
-
 namespace {
 MethodType kMethodType = "textDocument/didChange";
 
diff --git a/src/messages/text_document_did_open.cc b/src/messages/text_document_did_open.cc
index a91afb1c..12c79bdb 100644
--- a/src/messages/text_document_did_open.cc
+++ b/src/messages/text_document_did_open.cc
@@ -7,8 +7,6 @@
 #include "timer.h"
 #include "working_files.h"
 
-#include <loguru.hpp>
-
 namespace {
 MethodType kMethodType = "textDocument/didOpen";
 
@@ -69,7 +67,6 @@ struct Handler_TextDocumentDidOpen
           true /* priority */);
 
       clang_complete->FlushSession(entry.filename);
-      LOG_S(INFO) << "Flushed clang complete sessions for " << entry.filename;
     }
   }
 };
diff --git a/src/messages/text_document_did_save.cc b/src/messages/text_document_did_save.cc
index 3e5a9011..50835f01 100644
--- a/src/messages/text_document_did_save.cc
+++ b/src/messages/text_document_did_save.cc
@@ -4,8 +4,6 @@
 #include "project.h"
 #include "queue_manager.h"
 
-#include <loguru/loguru.hpp>
-
 namespace {
 MethodType kMethodType = "textDocument/didSave";
 
diff --git a/src/messages/workspace_did_change_configuration.cc b/src/messages/workspace_did_change_configuration.cc
index afe578ca..ab33009b 100644
--- a/src/messages/workspace_did_change_configuration.cc
+++ b/src/messages/workspace_did_change_configuration.cc
@@ -6,8 +6,6 @@
 #include "timer.h"
 #include "working_files.h"
 
-#include <loguru.hpp>
-
 namespace {
 MethodType kMethodType = "workspace/didChangeConfiguration";
 
@@ -38,7 +36,6 @@ struct Handler_WorkspaceDidChangeConfiguration
         "[perf] Dispatched workspace/didChangeConfiguration index requests");
 
     clang_complete->FlushAllSessions();
-    LOG_S(INFO) << "Flushed all clang complete sessions";
   }
 };
 REGISTER_MESSAGE_HANDLER(Handler_WorkspaceDidChangeConfiguration);
diff --git a/src/messages/workspace_did_change_watched_files.cc b/src/messages/workspace_did_change_watched_files.cc
index e15e9e21..3140a929 100644
--- a/src/messages/workspace_did_change_watched_files.cc
+++ b/src/messages/workspace_did_change_watched_files.cc
@@ -5,8 +5,6 @@
 #include "queue_manager.h"
 #include "working_files.h"
 
-#include <loguru/loguru.hpp>
-
 namespace {
 MethodType kMethodType = "workspace/didChangeWatchedFiles";
 
diff --git a/src/messages/workspace_symbol.cc b/src/messages/workspace_symbol.cc
index 910cfdab..77df7fea 100644
--- a/src/messages/workspace_symbol.cc
+++ b/src/messages/workspace_symbol.cc
@@ -4,8 +4,6 @@
 #include "query_utils.h"
 #include "queue_manager.h"
 
-#include <loguru.hpp>
-
 #include <ctype.h>
 #include <limits.h>
 #include <algorithm>
@@ -70,9 +68,6 @@ struct Handler_WorkspaceSymbol : BaseMessageHandler<In_WorkspaceSymbol> {
     Out_WorkspaceSymbol out;
     out.id = request->id;
 
-    LOG_S(INFO) << "[querydb] Considering " << db->symbols.size()
-                << " candidates for query " << request->params.query;
-
     std::string query = request->params.query;
 
     // {symbol info, matching detailed_name or short_name, index}
@@ -129,8 +124,6 @@ struct Handler_WorkspaceSymbol : BaseMessageHandler<In_WorkspaceSymbol> {
         out.result.push_back(std::get<0>(entry));
     }
 
-    LOG_S(INFO) << "[querydb] Found " << out.result.size()
-                << " results for query " << query;
     QueueManager::WriteStdout(kMethodType, out);
   }
 };
diff --git a/src/import_pipeline.cc b/src/pipeline.cc
similarity index 98%
rename from src/import_pipeline.cc
rename to src/pipeline.cc
index 5ed8ebd8..b552448f 100644
--- a/src/import_pipeline.cc
+++ b/src/pipeline.cc
@@ -1,10 +1,11 @@
-#include "import_pipeline.h"
+#include "pipeline.hh"
 
 #include "cache_manager.h"
 #include "clang_complete.h"
 #include "config.h"
 #include "diagnostics_engine.h"
 #include "include_complete.h"
+#include "log.hh"
 #include "lsp.h"
 #include "message_handler.h"
 #include "platform.h"
@@ -13,8 +14,9 @@
 #include "queue_manager.h"
 #include "timer.h"
 
-#include <doctest/doctest.h>
-#include <loguru.hpp>
+#include <llvm/ADT/Twine.h>
+#include <llvm/Support/Threading.h>
+using namespace llvm;
 
 #include <chrono>
 #include <thread>
@@ -275,7 +277,7 @@ void QueryDb_OnIndexed(QueueManager* queue,
 
 void LaunchStdinLoop(std::unordered_map<MethodType, Timer>* request_times) {
   std::thread([request_times]() {
-    SetThreadName("stdin");
+    set_thread_name("stdin");
     auto* queue = QueueManager::instance();
     while (true) {
       std::unique_ptr<InMessage> message;
@@ -316,7 +318,7 @@ void LaunchStdinLoop(std::unordered_map<MethodType, Timer>* request_times) {
 void LaunchStdoutThread(std::unordered_map<MethodType, Timer>* request_times,
                         MultiQueueWaiter* waiter) {
   std::thread([=]() {
-    SetThreadName("stdout");
+    set_thread_name("stdout");
     auto* queue = QueueManager::instance();
 
     while (true) {
diff --git a/src/import_pipeline.h b/src/pipeline.hh
similarity index 100%
rename from src/import_pipeline.h
rename to src/pipeline.hh
diff --git a/src/platform.h b/src/platform.h
index 775486a0..7d73549a 100644
--- a/src/platform.h
+++ b/src/platform.h
@@ -8,8 +8,6 @@
 
 std::string NormalizePath(const std::string& path);
 
-void SetThreadName(const char* name);
-
 // Free any unused memory and return it to the system.
 void FreeUnusedMemory();
 
diff --git a/src/platform_posix.cc b/src/platform_posix.cc
index d1d6c9e0..10bad8d4 100644
--- a/src/platform_posix.cc
+++ b/src/platform_posix.cc
@@ -1,13 +1,8 @@
-#include <llvm/ADT/Twine.h>
-#include <llvm/Support/Threading.h>
-
 #if defined(__unix__) || defined(__APPLE__)
 #include "platform.h"
 
 #include "utils.h"
 
-#include <loguru.hpp>
-
 #include <assert.h>
 #include <limits.h>
 #include <stdio.h>
@@ -160,8 +155,3 @@ std::string GetExternalCommandOutput(const std::vector<std::string>& command,
 }
 
 #endif
-
-void SetThreadName(const char* name) {
-  loguru::set_thread_name(name);
-  llvm::set_thread_name(name);
-}
diff --git a/src/project.cc b/src/project.cc
index 3ca211d4..44682d98 100644
--- a/src/project.cc
+++ b/src/project.cc
@@ -4,6 +4,7 @@
 #include "clang_utils.h"
 #include "filesystem.hh"
 #include "language.h"
+#include "log.hh"
 #include "match.h"
 #include "platform.h"
 #include "queue_manager.h"
@@ -25,7 +26,6 @@ using namespace llvm::opt;
 #include <clang-c/CXCompilationDatabase.h>
 #include <doctest/doctest.h>
 #include <rapidjson/writer.h>
-#include <loguru.hpp>
 
 #if defined(__unix__) || defined(__APPLE__)
 #include <unistd.h>
diff --git a/src/query.cc b/src/query.cc
index 59edfe03..256d5fa3 100644
--- a/src/query.cc
+++ b/src/query.cc
@@ -5,7 +5,6 @@
 #include "serializers/json.h"
 
 #include <doctest/doctest.h>
-#include <loguru.hpp>
 
 #include <cassert>
 #include <cstdint>
diff --git a/src/query_utils.cc b/src/query_utils.cc
index c0bdac2e..9f801ced 100644
--- a/src/query_utils.cc
+++ b/src/query_utils.cc
@@ -2,9 +2,7 @@
 
 #include "queue_manager.h"
 
-#include <loguru.hpp>
-
-#include <climits>
+#include <limits.h>
 #include <unordered_set>
 
 namespace {
diff --git a/src/serializer.cc b/src/serializer.cc
index 734c147a..72090c6e 100644
--- a/src/serializer.cc
+++ b/src/serializer.cc
@@ -1,13 +1,12 @@
 #include "serializer.h"
 
 #include "filesystem.hh"
+#include "log.hh"
 #include "serializers/binary.h"
 #include "serializers/json.h"
 
 #include "indexer.h"
 
-#include <loguru.hpp>
-
 #include <stdexcept>
 
 using namespace llvm;
@@ -414,7 +413,7 @@ std::unique_ptr<IndexFile> Deserialize(
         file = std::make_unique<IndexFile>(path, file_content);
         Reflect(reader, *file);
       } catch (std::invalid_argument& e) {
-        LOG_S(INFO) << "Failed to deserialize '" << path
+        LOG_S(INFO) << "failed to deserialize '" << path
                     << "': " << e.what();
         return nullptr;
       }
diff --git a/src/test.cc b/src/test.cc
index 6cd4b2f7..00dec826 100644
--- a/src/test.cc
+++ b/src/test.cc
@@ -11,7 +11,6 @@
 #include <rapidjson/prettywriter.h>
 #include <rapidjson/stringbuffer.h>
 #include <rapidjson/writer.h>
-#include <loguru/loguru.hpp>
 
 #include <stdio.h>
 #include <stdlib.h>
diff --git a/src/third_party_impl.cc b/src/third_party_impl.cc
index 231ab76c..572a07d3 100644
--- a/src/third_party_impl.cc
+++ b/src/third_party_impl.cc
@@ -1,5 +1,2 @@
 #define DOCTEST_CONFIG_IMPLEMENT
 #include <doctest/doctest.h>
-
-#define LOGURU_IMPLEMENTATION 1
-#include <loguru.hpp>
diff --git a/src/timer.cc b/src/timer.cc
index 96ec658c..022ca22e 100644
--- a/src/timer.cc
+++ b/src/timer.cc
@@ -1,6 +1,6 @@
 #include "timer.h"
 
-#include <loguru.hpp>
+#include "log.hh"
 
 Timer::Timer() {
   Reset();
diff --git a/src/type_printer.cc b/src/type_printer.cc
index 06346d47..eac5ad41 100644
--- a/src/type_printer.cc
+++ b/src/type_printer.cc
@@ -1,7 +1,5 @@
 #include "type_printer.h"
 
-#include <loguru.hpp>
-
 namespace {
 
 int GetNameInsertingPosition(const std::string& type_desc,
@@ -82,12 +80,8 @@ std::tuple<std::string, int16_t, int16_t, int16_t> GetFunctionSignature(
     std::string type_desc_with_names(type_desc.begin(), type_desc.begin() + i);
     type_desc_with_names.append(func_name);
     for (auto& arg : args) {
-      if (arg.first < 0) {
-        LOG_S(ERROR)
-            << "When adding argument names to '" << type_desc
-            << "', failed to detect positions to insert argument names";
+      if (arg.first < 0)
         break;
-      }
       if (arg.second.empty())
         continue;
       // TODO Use inside-out syntax. Note, clang/lib/AST/TypePrinter.cpp does
diff --git a/src/utils.cc b/src/utils.cc
index 57a5319f..cc448476 100644
--- a/src/utils.cc
+++ b/src/utils.cc
@@ -2,11 +2,10 @@
 
 #include "filesystem.hh"
 using namespace llvm;
+#include "log.hh"
 #include "platform.h"
 
-#include <doctest/doctest.h>
 #include <siphash.h>
-#include <loguru/loguru.hpp>
 
 #include <assert.h>
 #include <ctype.h>
diff --git a/src/working_files.cc b/src/working_files.cc
index 5e293464..cfefda8a 100644
--- a/src/working_files.cc
+++ b/src/working_files.cc
@@ -1,10 +1,10 @@
 #include "working_files.h"
 
 #include "lex_utils.h"
+#include "log.hh"
 #include "position.h"
 
 #include <doctest/doctest.h>
-#include <loguru.hpp>
 
 #include <algorithm>
 #include <climits>
@@ -320,23 +320,9 @@ void WorkingFile::ComputeLineMapping() {
 std::optional<int> WorkingFile::GetBufferPosFromIndexPos(int line,
                                                     int* column,
                                                     bool is_end) {
-  // The implementation is simple but works pretty well for most cases. We
-  // lookup the line contents in the indexed file contents, and try to find the
-  // most similar line in the current buffer file.
-  //
-  // Previously, this was implemented by tracking edits and by running myers
-  // diff algorithm. They were complex implementations that did not work as
-  // well.
-
-  // Note: |index_line| and |buffer_line| are 1-based.
-
-  // TODO: reenable this assert once we are using the real indexed file.
-  // assert(index_line >= 1 && index_line <= index_lines.size());
   if (line < 0 || line >= (int)index_lines.size()) {
-    loguru::Text stack = loguru::stacktrace();
-    LOG_S(WARNING) << "Bad index_line (got " << line << ", expected [0, "
-                   << index_lines.size() << ")) in " << filename
-                   << stack.c_str();
+    LOG_S(WARNING) << "bad index_line (got " << line << ", expected [0, "
+                   << index_lines.size() << ")) in " << filename;
     return std::nullopt;
   }
 
diff --git a/third_party/loguru b/third_party/loguru
deleted file mode 160000
index 6bf94c5f..00000000
--- a/third_party/loguru
+++ /dev/null
@@ -1 +0,0 @@
-Subproject commit 6bf94c5f2bec437e871402d0a27e8a3094b261d5