Make numerous improvements

- Python static hello world now 1.8mb
- Python static fully loaded now 10mb
- Python HTTPS client now uses MbedTLS
- Python REPL now completes import stmts
- Increase stack size for Python for now
- Begin synthesizing posixpath and ntpath
- Restore Python \N{UNICODE NAME} support
- Restore Python NFKD symbol normalization
- Add optimized code path for Intel SHA-NI
- Get more Python unit tests passing faster
- Get Python help() pagination working on NT
- Python hashlib now supports MbedTLS PBKDF2
- Make memcpy/memmove/memcmp/bcmp/etc. faster
- Add Mersenne Twister and Vigna to LIBC_RAND
- Provide privileged __printf() for error code
- Fix zipos opendir() so that it reports ENOTDIR
- Add basic chmod() implementation for Windows NT
- Add Cosmo's best functions to Python cosmo module
- Pin function trace indent depth to that of caller
- Show memory diagram on invalid access in MODE=dbg
- Differentiate stack overflow on crash in MODE=dbg
- Add stb_truetype and tools for analyzing font files
- Upgrade to UNICODE 13 and reduce its binary footprint
- COMPILE.COM now logs resource usage of build commands
- Start implementing basic poll() support on bare metal
- Set getauxval(AT_EXECFN) to GetModuleFileName() on NT
- Add descriptions to strerror() in non-TINY build modes
- Add COUNTBRANCH() macro to help with micro-optimizations
- Make error / backtrace / asan / memory code more unbreakable
- Add fast perfect C implementation of μ-Law and a-Law audio codecs
- Make strtol() functions consistent with other libc implementations
- Improve Linenoise implementation (see also github.com/jart/bestline)
- COMPILE.COM now suppresses stdout/stderr of successful build commands

libc/str/blake2.c

@@ -153,6 +153,20 @@ int BLAKE2B256_Final(struct Blake2b *b2b,
   return 0;
 }
 
+/**
+ * Computes blake2b 256bit message digest.
+ *
+ *     blake2b256 n=0                     191 nanoseconds
+ *     blake2b256 n=8                      23 ns/byte         40,719 kb/s
+ *     blake2b256 n=31                      6 ns/byte            153 mb/s
+ *     blake2b256 n=32                      6 ns/byte            158 mb/s
+ *     blake2b256 n=63                      3 ns/byte            312 mb/s
+ *     blake2b256 n=64                      3 ns/byte            317 mb/s
+ *     blake2b256 n=128                     1 ns/byte            640 mb/s
+ *     blake2b256 n=256                     1 ns/byte            662 mb/s
+ *     blake2b256 n=22851                   1 ns/byte            683 mb/s
+ *
+ */
 int BLAKE2B256(const void *data, size_t len,
                uint8_t out[BLAKE2B256_DIGEST_LENGTH]) {
   struct Blake2b ctx;