I'm curious how fast libstd grows. I'd like to count number of functions in it.
I've tried by counting number of "std" items in rustdoc's search index, but it gives odd results with a bump between 1.26-1.28:
I suspect that's due to counting unstable items, perhaps stdsimd.
Any ideas for a better method?
Counting the number of #[(stable will give a decent underestimate.
(It's an underestimate because in e.g. std::num, macros are used to paste the same functionality between the different numeric types. This might actually be a benefit: only count count_ones twice rather than 24(?) times. Also whitespace is allowed in there, but you can account for that with a cleverer grep.)
In fact, if you parse the entire #[stable] attribute, you can attribute each public API to its stabilized version in one pass, since all #[stable] attributes include the stabilized version.
Brilliant!
45 1.0 env
39 1.0 process
2511 1.0 rust1
2 1.1 box_borrow
9 1.1 dir_entry_ext
5 1.1 file_type
1 1.1 fmt_write_char
20 1.1 from_raw_os
16 1.1 fs_ext
2 1.1 ip_u32
5 1.1 iter_cloned
81 1.1 metadata_ext
630 1.1 raw_ext
17 1.1 raw_os
4 1.1 receiver_into_iter
1 1.1 set_permissions
4 1.1 split_whitespace
4 1.1 symlink
1 1.1 symlink_metadata
2 1.2 cell_eq
24 1.2 debug_builders
7 1.2 extend_ref
1 1.2 formatter_write
1 1.2 io_invalid_data
8 1.2 iter_empty
6 1.2 iter_once
10 1.2 num_wrapping
1 1.2 once_new
13 1.2 process_extensions
3 1.2 str_matches
6 1.2 sync_poison
2 1.2 unicode_case_mapping
2 1.3 atomic_debug
2 1.3 box_slice_clone
2 1.3 cstr_borrow
1 1.3 cstr_debug
5 1.3 derefmut_for_string
10 1.3 duration
12 1.3 error_downcast
1 1.3 hash_slice
10 1.3 hasher_write
3 1.3 io_error_inner
1 1.3 process_id
1 1.3 rename_connect_to_join
1 1.3 time
1 1.3 wrapping_div
2 1.4 addr_parse_error_error
2 1.4 append
3 1.4 arc_unique
8 1.4 arc_weak
2 1.4 array_borrow
2 1.4 array_default
1 1.4 binaryheap_debug
2 1.4 box_raw
2 1.4 box_str
11 1.4 core_prelude
2 1.4 cstr_memory
2 1.4 cstr_to_str
2 1.4 extend_string
1 1.4 fmt_write_blanket_impl
7 1.4 fnptr_impls
2 1.4 hash_extend_copy
30 1.4 into_raw_os
4 1.4 iter_to_slice
2 1.4 option_iter
1 1.4 park_timeout
3 1.4 rc_unique
8 1.4 rc_weak
1 1.4 result_expect
2 1.4 result_iter
8 1.4 socket_timeout
2 1.4 split_off
2 1.4 str_split_at
1 1.4 thread_sleep
1 1.4 vec_deque_retain
4 1.5 binary_heap_extras_15
2 1.5 char_from_unchecked
1 1.5 cursor_box_slice
6 1.5 deque_extras_15
12 1.5 file_type_ext
7 1.5 fmt_flags
1 1.5 fs_canonicalize
8 1.5 iter_order
20 1.5 lossless_int_conv
1 1.5 mut_slice_default
8 1.5 path_ext
4 1.5 slice_splits
4 1.5 smart_ptr_as_ref
2 1.5 socket_addr_from_str
3 1.5 str_match_indices
1 1.5 str_parse_error
1 1.5 str_slice_mut
1 1.5 utf8_error
2 1.5 vec_as_mut
1 1.5 vec_resize
3 1.5 wait_timeout
2 1.6 core
2 1.6 cow_from_path
10 1.6 dir_builder
34 1.6 drain
3 1.6 from_for_ptrs
2 1.6 iter_cmp_by_key
11 1.6 lossless_float_conv
1 1.6 mutex_get_mut
1 1.6 mutex_into_inner
2 1.6 partialeq_path
2 1.6 path_into_iter
2 1.6 read_exact
1 1.6 rwlock_get_mut
1 1.6 rwlock_into_inner
2 1.6 string_box_error
1 1.6 vec_extend_from_slice
2 1.7 btree_drop
7 1.7 build_hasher
1 1.7 clone_from_slice
4 1.7 cstring_asref
9 1.7 cstring_into
2 1.7 f32_deg_rad_conversions
8 1.7 hashmap_build_hasher
9 1.7 ip_17
9 1.7 ip_addr
1 1.7 path_strip_prefix
1 1.7 process_output_debug
1 1.7 slice_sort_by_key
2 1.7 string_as_str
3 1.7 strip_prefix
2 1.7 vec_as_slice
26 1.7 wrapping
1 1.7 wrapping_impls
1 1.8 box_error
2 1.8 cell_map
4 1.8 cmp_os_str
6 1.8 cmp_path
2 1.8 cow_from_vec
1 1.8 cow_os_str_as_ref_path
2 1.8 drop_in_place
4 1.8 encode_utf16
251 1.8 metadata_ext2
3 1.8 mpsc_debug
44 1.8 op_assign_traits
16 1.8 pthread_t
1 1.8 slice_to_socket_addrs
1 1.8 str_parse_error2
20 1.8 time2
1 1.8 vec_into_iter_clone
2 1.9 ascii
19 1.9 catch_unwind
1 1.9 chain_bufread
1 1.9 copy_from_slice
19 1.9 core_impl_debug
9 1.9 decode_utf16
1 1.9 double_ended_skip_iterator
1 1.9 expand_open_options2
1 1.9 file_try_clone
1 1.9 from_slice_v4
2 1.9 hashmap_public_hasher
1 1.9 ipv6_from_octets
1 1.9 is_char_boundary
31 1.9 net2_mutators
2 1.9 osstring_default
7 1.9 osstring_simple_functions
2 1.9 process_exec2
3 1.9 ptr_as_ref
1 1.9 resume_unwind
6 1.9 set_recovery
8 1.9 sockaddr_setters
1 1.9 str_to_string_specialization
7 1.9 thread_extensions
8 1.9 time_augmented_assignment
2 1.9 volatile
4 1.10 cell_ord
1 1.10 condvar_default
2 1.10 cstr_default
4 1.10 cstr_from_bytes
4 1.10 downgraded_weak
4 1.10 extended_compare_and_swap
3 1.10 fs_time
6 1.10 map_entry_keys
9 1.10 map_values_mut
1 1.10 mutex_default
9 1.10 open_options_ext
10 1.10 panic_hooks
1 1.10 rw_lock_default
1 1.10 slice_binary_search_by_key
63 1.10 unix_socket
1 1.10 unsafe_cell_default
2 1.10 vecdeque_vec_conversions
1 1.10 wrapping_display
1 1.10 wrapping_neg
1 1.11 binary_heap_append
2 1.11 btree_append
2 1.11 btree_split_off
2 1.11 cell_get_mut
1 1.11 default
2 1.11 exact_size_escape
1 1.11 fmt_error
2 1.11 iter_arith
4 1.11 wrapping_fmt
5 1.12 binary_heap_peek_mut
2 1.12 cell_as_ptr
3 1.12 cell_from
3 1.12 cow_str_from_iter
3 1.12 debug_btree_map
3 1.12 debug_hash_map
2 1.12 env_iterators
5 1.12 exit_status_from
1 1.12 fn_once_output
4 1.12 ip_shared
1 1.12 ipv6_to_octets
9 1.12 iter_arith_traits
1 1.12 linked_list_contains
4 1.12 map_entry_recover_keys2
4 1.12 mpsc_recv_timeout
1 1.12 option_from
1 1.12 stringaddassign
2 1.12 unwind_safe_lock_refs
1 1.12 vec_deque_contains
2 1.13 assert_ne
2 1.13 char_convert
1 1.13 cstring_drop
1 1.13 dir_entry_debug
4 1.13 hashmap_default_hasher
3 1.13 no_panic_abs
1 1.13 path_components_debug
1 1.13 path_iter_debug
1 1.13 slice_iter_as_ref
10 1.13 try_borrow
1 1.13 vec_intoiter_debug
4 1.14 cow_add
1 1.14 from_path_buf_for_os_string
1 1.14 from_string_for_vec_u8
1 1.14 io_error_from_errorkind
1 1.14 string_from_cow_str
4 1.14 unwind_safe_atomic_refs
1 1.14 vec_from_cow_slice
1 1.14 wrapping_iter_arith
10 1.14 wrapping_ref
2 1.15 arc_counts
4 1.15 atomic_access
1 1.15 cell_extras
14 1.15 file_offset
1 1.15 io_take_into_inner
1 1.15 iter_max_by
1 1.15 iter_min_by
2 1.15 mpsc_recv_timeout_error
16 1.15 proc_macro_lib
2 1.15 process_exec
2 1.15 rc_counts
3 1.15 receiver_try_iter
5 1.15 slice_get_slice_impls
2 1.15 unicode_encode_char
2 1.15 vec_into_iter_as_slice
4 1.16 char_struct_display
2 1.16 dedup_by
2 1.16 deque_extras
4 1.16 duration_checked_ops
2 1.16 duration_sum
1 1.16 insert_str
8 1.16 ip_cmp
4 1.16 ip_from_ip
2 1.16 ipaddr_checker
1 1.16 ipv6_from_segments
2 1.16 iter_arith_traits_result
2 1.16 ptr_wrapping_offset
1 1.16 repeat_str
1 1.16 result_unwrap_or_default
1 1.16 set_permissions_atomic
2 1.16 sockaddr_checker
48 1.16 std_debug
1 1.16 str_replacen
1 1.16 string_split_off
1 1.16 string_to_socket_addrs
3 1.16 windows_process_extensions
1 1.17 addr_from_into_ip
1 1.17 box_default_extra
1 1.17 box_from_c_str
1 1.17 box_from_os_str
1 1.17 box_from_path
2 1.17 box_from_slice
14 1.17 btree_range
24 1.17 collection_debug
6 1.17 collections_bound
1 1.17 cow_str_to_string_specialization
2 1.17 default_box_extra
1 1.17 default_for_pathbuf
2 1.17 frombyteswithnulerror_impls
3 1.17 ip_from_slice
4 1.17 move_cell
2 1.17 ordering_chaining
1 1.17 process_abort
3 1.17 ptr_eq
2 1.17 ptr_unaligned
4 1.17 rc_raw
1 1.17 result_expect_err
1 1.17 string_from_iter_by_ref
1 1.17 string_to_string_specialization
1 1.17 vec_deque_partial_eq_slice
1 1.18 binary_heap_peek_mut_pop
1 1.18 c_string_from_box
1 1.18 os_string_from_box
1 1.18 path_buf_from_box
3 1.18 peek
1 1.18 process_try_wait
2 1.18 retain_hash_collection
1 1.18 string_from_box
1 1.18 vec_from_box
1 1.19 boxed_str_conv
1 1.19 command_envs
2 1.19 eprint
2 1.19 herd_cows
1 1.19 mutexguard
1 1.19 osstring_shrink_to_fit
4 1.19 reverse_cmp_key
2 1.19 thread_id
1 1.19 vec_from_mut
1 1.20 as_c_str
1 1.20 box_from_c_string
1 1.20 box_from_os_string
1 1.20 box_from_path_buf
1 1.20 box_from_str
1 1.20 box_from_vec
5 1.20 char_escape_debug
5 1.20 char_from_str
1 1.20 compile_error_macro
4 1.20 float_bits_conv
2 1.20 into_boxed_c_str
2 1.20 into_boxed_os_str
2 1.20 into_boxed_path
7 1.20 manually_drop
5 1.20 more_io_inner_methods
2 1.20 option_entry
3 1.20 sort_unstable
5 1.20 std_guard_impls
4 1.20 stdio_from
2 1.20 str_box_extras
8 1.20 str_checked_slicing
3 1.20 str_mut_extras
1 1.20 utf8_error_error_len
9 1.21 asraw_stdio
1 1.21 compiler_fences
8 1.21 discriminant_value
1 1.21 iterator_for_each
1 1.21 needs_drop
2 1.21 ord_max_min
10 1.21 shared_from_slice
1 1.21 tcpstream_connect_timeout
6 1.21 vec_splice
2 1.22 cow_box_error
2 1.22 indirect_hasher_impl
1 1.22 op_assign_builtins_by_ref
24 1.23 ascii_methods_on_intrinsics
1 1.23 atomic_from
2 1.23 rwlock_guard_sync
1 1.23 unit_from_iter
20 1.24 ascii_ctype_on_intrinsics
1 1.24 atomic_bool_from
1 1.24 atomic_pointer
3 1.24 mpsc_error_conversions
1 1.24 mutex_from
1 1.24 refcell_replace
1 1.24 refcell_swap
1 1.24 rw_lock_from
12 1.24 shared_from_slice2
1 1.24 spin_loop_hint
1 1.25 cursor_mut_vec
22 1.25 nonnull
1 1.25 panic_col
1 1.25 path_component_asref
1 1.26 box_leak
2 1.26 entry_and_modify
4 1.26 env_unimpl_send_sync
1 1.26 from_utf8_error_as_bytes
1 1.26 fs_read_write
2 1.26 fs_read_write_bytes
101 1.26 fused
1 1.26 getpid
22 1.26 i128
17 1.26 inclusive_range
3 1.26 lossless_iusize_conv
1 1.26 option_ref_mut_cloned
2 1.26 panic_hook_display
27 1.26 pointer_methods
2 1.26 slice_rotate
1 1.26 string_retain
5 1.26 thread_local_try_with
1 1.27 core_hint
1 1.27 duration_debug_impl
3 1.27 duration_extras
1 1.27 duration_from_micros
1 1.27 hash_map_remove_entry
4 1.27 inclusive_range_methods
1 1.27 iter_rfind
1 1.27 iter_rfold
3 1.27 iterator_try_fold
1 1.27 nonnull_cast
1 1.27 option_filter
2 1.27 simd_arch
15 1.27 slice_rsplit
1 1.27 splice
1 1.27 swap_nonoverlapping
1 1.27 swap_with_slice
1 1.27 take_set_limit
2 1.27 unix_ppid
1 1.27 unreachable
10 1.28 alloc_layout
2 1.28 alloc_module
8 1.28 alloc_system_type
4 1.28 any_send_sync_methods
1 1.28 assoc_unix_epoch
16 1.28 collections_range
3 1.28 cow_from_cstr
3 1.28 cow_from_osstr
1 1.28 cow_from_pathbuf_ref
1 1.28 cow_from_string_ref
1 1.28 cow_from_vec_ref
1 1.28 cstring_from_cow_cstr
1 1.28 default_mut_str
2 1.28 entry_or_default
1 1.28 extend_for_unit
6 1.28 fmt_flags_align
12 1.28 from_bool
3 1.28 from_ref
11 1.28 global_alloc
1 1.28 global_allocator
5 1.28 iterator_repeat_with
5 1.28 iterator_step_by
7 1.28 nonzero
1 1.28 osstring_from_cow_osstr
4 1.28 path_ancestors
1 1.28 pathbuf_from_cow_path
11 1.28 slice_get_slice
2 1.29 build_hasher_eq
8 1.29 iterator_flatten
2 1.29 joinhandle_impl_send_sync
3 1.29 more_box_slice_clone
1 1.29 never_hash
2 1.29 os_str_str_ref_eq
80 1.29 proc_macro_lib2
2 1.29 rc_downcast
2 1.30 core_c_void
1 1.30 error_source
5 1.30 ip_constructors
1 1.30 iterator_find_map
2 1.30 option_ref_from_ref_option
2 1.30 slice_align_to
2 1.30 token_stream_extend
4 1.30 trim_direction
18 1.31 chunks_exact
1 1.31 from_nonzero
1 1.31 option_replace
33 1.31 rchunks
1 1.31 symmetric_u32_duration_mul
1 1.32 boxed_slice_from_iter
1 1.32 dbg_macro
12 1.32 int_to_from_bytes
1 1.32 path_from_str
1 1.33 convert_id
3 1.33 duration_as_u128
34 1.33 pin
4 1.33 rw_exact_all_at
2 1.33 transpose_result
2 1.33 vec_resize_with
10 1.34 convert_infallible
1 1.34 get_type_id
5 1.34 iter_from_fn
6 1.34 iter_successors
8 1.34 no_panic_pow
2 1.34 process_pre_exec
7 1.34 signed_nonzero
1 1.34 slice_sort_by_cached_key
6 1.34 split_ascii_whitespace
10 1.34 str_escape
4 1.34 time_checked_add
26 1.34 try_from
9 1.35 asraw_stdio_locks
3 1.35 boxed_closure_impls
2 1.35 copied
2 1.35 copysign
2 1.35 exact_size_case_mapping_iter
1 1.35 from_ref_string
1 1.35 nonzero_parse
1 1.35 ptr_hash
6 1.35 range_contains
2 1.35 refcell_map_split
1 1.35 refcell_replace_swap
2 1.36 align_offset
2 1.36 core_array
45 1.36 futures_api
1 1.36 hashbrown
11 1.36 iovec
8 1.36 iter_copied
9 1.36 maybe_uninit
1 1.36 str_as_mut_ptr
1 1.36 string_borrow_mut
1 1.36 try_from_slice_error
2 1.36 vecdeque_rotate
2 1.37 as_cell
1 1.37 borrow_state
2 1.37 bufreader_buffer
1 1.37 copy_within
2 1.37 iter_arith_traits_option
1 1.37 iter_nth_back
1 1.37 option_xor
3 1.37 reverse_bits
2 1.37 shared_from_iter
2 1.37 vec_as_ptr
18 1.38 builtin_macro_prelude
1 1.38 chars_debug_impl
1 1.38 double_ended_peek_iterator
1 1.38 double_ended_step_by_iterator
1 1.38 double_ended_take_iterator
8 1.38 duration_float
20 1.38 euclidean_division
2 1.38 pin_raw
2 1.38 ptr_cast
1 1.38 type_name
1 1.39 ascii_escape_display
2 1.39 checked_duration_since
2 1.39 pin_into_inner
2 1.39 weak_ptr_eq
4 1.39 wrapping_ref_ops
8 1.40 array_value_iter_impls
12 1.40 float_to_from_bytes
2 1.40 map_get_key_value
1 1.40 mem_take
2 1.40 option_deref
1 1.40 option_flattening
1 1.40 repeat_generic_slice
1 1.40 todo_macro
1 1.40 udp_peer_addr
1 1.41 maybe_uninit_debug
35 1.41 nz_int_conv
5 1.41 pin_trait_impls
1 1.41 result_map_or
1 1.41 result_map_or_else
4 1.41 weak_counts
2 1.42 debug_map_key_value
2 1.42 integer_exp_format
2 1.42 iter_empty_send_sync
1 1.42 manually_drop_take
1 1.42 matches_macro
2 1.42 slice_from_raw_parts
1 1.42 wait_timeout_until
1 1.42 wait_until
32 1.43 assoc_int_consts
3 1.43 boxed_slice_try_from
19 1.43 core_primitive
1 1.43 cstring_from_vec_of_nonzerou8
4 1.43 extra_log_consts
8 1.43 iter_once_with
1 1.43 once_is_completed
1 1.43 string_as_mut
1 1.44 convert_infallible_hash
2 1.44 float_approx_unchecked_to
1 1.44 from_mut_str_for_string
4 1.44 iovec-send-sync
2 1.44 mut_osstr
2 1.44 proc_macro_lexerror_impls
1 1.44 vec_from_array
And here's comparison between number of stabilized items and the number of unique feature flags that reached stable for the first time in each release:
Sadly, the data doesn't tell the whole story:
There were several features that were overcounted, e.g. box_from_c_str, box_from_os_str, box_from_path, box_from_slice are essentially the same minor change.
There were some features that needed lots of functions, e.g. Iterator.fused() touched a lot of code, even though for the user that's only one function. Similarly with anything related to integers, e.g. i128 or NonZero* have tons of standard integer functionality and conversions which count as new functions, but from user perspective it's nothing new.
And some features are way bigger than others. futures_api is 1 feature, but a major shift.
I've tried manually adding weight to features, but at this point it's totally subjective. Fudge-weighed amount of changes in each Rust release:
Notable changes:
? operatori128
TryFrom
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