diff --git a/include/fmt/chrono.h b/include/fmt/chrono.h
index 2349fd8c..e7c464a4 100644
--- a/include/fmt/chrono.h
+++ b/include/fmt/chrono.h
@@ -764,18 +764,15 @@ inline std::chrono::duration<Rep, std::milli> get_milliseconds(
 
 template <typename Char, typename Rep, typename OutputIt>
 OutputIt format_duration_value(OutputIt out, Rep val, int precision) {
-  using context = FMT_BUFFER_CONTEXT(type_identity_t<Char>);
-
-  const Char pr_f[] = {'{', ':', '.', '{', '}', 'f', '}', 0};
-  if (precision >= 0) {
-    return vformat_to(out, to_string_view(pr_f),
-                      make_format_args<context>(val, precision));
+  static constexpr const Char pr_f[] = {'{', ':', '.', '{', '}', 'f', '}', 0};
+  if (precision >= 0) return format_to(out, FMT_STRING(pr_f), val, precision);
+  static constexpr const Char fp_f[] = {'{', ':', 'g', '}', 0};
+  static constexpr const Char format[] = {'{', '}', 0};
+  if(std::is_floating_point<Rep>::value) {
+    return format_to(out, FMT_STRING(fp_f), val);  
+  } else {
+    return format_to(out, FMT_STRING(format), val);
   }
-  const Char fp_f[] = {'{', ':', 'g', '}', 0};
-  const Char format[] = {'{', '}', 0};
-  return vformat_to(
-      out, to_string_view(std::is_floating_point<Rep>::value ? fp_f : format),
-      make_format_args<context>(val));
 }
 
 template <typename Char, typename OutputIt>
@@ -793,19 +790,12 @@ OutputIt copy_unit(string_view unit, OutputIt out, wchar_t) {
 
 template <typename Char, typename Period, typename OutputIt>
 OutputIt format_duration_unit(OutputIt out) {
-  using context = FMT_BUFFER_CONTEXT(type_identity_t<Char>);
-
-  if (const char* unit = get_units<Period>()) {
+  if (const char* unit = get_units<Period>())
     return copy_unit(string_view(unit), out, Char());
-  }
-  const Char num_f[] = {'[', '{', '}', ']', 's', 0};
-  if (const_check(Period::den == 1)) {
-    return vformat_to(out, to_string_view(num_f),
-                      make_format_args<context>(Period::num));
-  }
-  const Char num_def_f[] = {'[', '{', '}', '/', '{', '}', ']', 's', 0};
-  return vformat_to(out, to_string_view(num_def_f),
-                    make_format_args<context>(Period::num, Period::den));
+  static constexpr const Char num_f[] = {'[', '{', '}', ']', 's', 0};
+  if (const_check(Period::den == 1)) return format_to(out, FMT_STRING(num_f), Period::num);
+  static constexpr const Char num_def_f[] = {'[', '{', '}', '/', '{', '}', ']', 's', 0};
+  return format_to(out, FMT_STRING(num_def_f), Period::num, Period::den);
 }
 
 template <typename FormatContext, typename OutputIt, typename Rep,