• File size measurements show the distribution of size of files.
• Files are classified in four categories based on their size (lines of code): 1-100 (very small files), 101-200 (small files), 201-500 (medium size files), 501-1000 (long files), 1001+(very long files).
• It is a good practice to keep files small. Long files may become "bloaters", code that have increased to such gargantuan proportions that they are hard to work with.

• There are 168 files with 48,718 lines of code.
• 11 very long files (21,127 lines of code)
• 17 long files (11,909 lines of code)
• 29 medium size files (9,057 lines of codeclsfd_ftr_w_mp_ins)
• 25 small files (3,776 lines of code)
• 86 very small files (2,849 lines of code)

There are 53 files with lines longer than 120 characters. In total, there are 317 long lines.

File	# lines	# units	# long lines
uncompressed_image.cc in libheif/codecs	1202	30	33
heif.cc in libheif/api/libheif	2514	179	24
file.cc in libheif	1648	77	21
chroma_sampling.cc in libheif/color-conversion	633	-	20
heif_regions.cc in libheif/api/libheif	555	40	17
pixelimage.cc in libheif	967	30	15
context.cc in libheif	3069	80	13
file.h in libheif	199	21	13
heif_experimental.cc in libheif/api/libheif	197	13	10
box.cc in libheif	3554	230	10
heif.h in libheif/api/libheif	1075	-	9
heif.h in android_jni/app/src/main/include/libheif	1075	-	9
heif_experimental.h in libheif/api/libheif	50	-	8
decoder_ffmpeg.cc in libheif/plugins	437	16	8
LibFindMacros.cmake in cmake/modules	249	-	8
heif_jni.cpp in android_jni/app/src/main/cpp	247	-	7
encoder_svt.cc in libheif/plugins	663	25	5
encoder_openjpeg.cc in libheif/plugins	439	27	5
uncompressed_box.cc in libheif/codecs	346	17	5
heif_items.cc in libheif/api/libheif	256	16	4
context.h in libheif	377	48	4
decoder_libde265.cc in libheif/plugins	290	11	4
encoder_jpeg.cc in libheif/plugins	341	24	4
encoder_rav1e.cc in libheif/plugins	522	23	4
decoder_aom.cc in libheif/plugins	210	8	4
init.cc in libheif	279	16	4
rgb2yuv.cc in libheif/color-conversion	647	1	3
yuv2rgb.cc in libheif/color-conversion	971	4	3
encoder_kvazaar.cc in libheif/plugins	562	26	3
decoder_dav1d.cc in libheif/plugins	222	8	3
decoder_vvdec.cc in libheif/plugins	244	8	3
encoder_openjph.cc in libheif/plugins	665	27	3
encoder_aom.cc in libheif/plugins	870	25	3
hevc.cc in libheif/codecs	469	12	3
encoder_uvg266.cc in libheif/plugins	567	25	2
encoder_uncompressed.cc in libheif/plugins	220	22	2
encoder_mask.cc in libheif/plugins	196	22	2
decoder_openjpeg.cc in libheif/plugins	254	13	2
encoder_vvenc.cc in libheif/plugins	505	24	2
nclx.cc in libheif	362	19	2
in heif_version.h.in in libheif/api/libheif	33	-	1
heif_regions.h in libheif/api/libheif	152	-	1
heif_emscripten.h in libheif/api/libheif	416	10	1
pixelimage.h in libheif	134	26	1
box.h in libheif	1168	78	1
decoder_jpeg.cc in libheif/plugins	185	8	1
encoder_x265.cc in libheif/plugins	753	29	1
jpeg.cc in libheif/codecs	30	3	1
vvc.cc in libheif/codecs	269	7	1
jpeg2000.h in libheif/codecs	243	20	1