The hash is a concatenation of a text to a much smaller fixed (for that application) length. 1 applet calculates the CRC-8, C (x) = … 1. It is often used to speed up comparisons or create a hash table. AES, 2-3x slower than Esenthel Cipher1, requires 16-byte alignment (which will increase data size 0-15 bytes per file and slow down seeking/random access), and negatively affects patching. AES. However, when comparing Foo to CRC-32, be aware that a SIMD-accelerated CRC-32 implementation can be 47x faster than SMHasher’s simple CRC-32 implementation. I tested three CityHash routines and the Intel crc32 instruction on a 434 MB file. SHA-1 is fastest hashing function with ~587.9 ms per 1M operations for short strings and 881.7 ms per 1M for longer strings. xxhash64 function (Databricks SQL) | Databricks on AWS Started by Alundra May 03, 2019 04:44 PM. vs 2.) In a similar way, GZIP/ZIP rely on the simple and non-cryptographic CRC32 hash because it's much faster than SHA1 (or whatever hash was available at the time). I've tested XXH3 using xxhash's built-in benchmark tool with clang-7.0.1 and gcc-8.2.1 on an Intel i9-9900K. Though you can use xxhash as an HMAC hash function, but it’s highly recommended not to.. xxhash is NOT a cryptographic hash function, it is a non-cryptographic hash algorithm aimed at speed and quality. Checksum vs Recompile your WSL2 kernel - support for snaps, apparmor, lxc, etc. crc32 I have been an avid ES evangelist for years but there are a few features I recently found to not exist in ES but that I think (and hope others with agree) would be a valuable addition to the already impressive feature list. R: Miscellaneous functions for Column operations Code is highly portable, and hashes are identical on all platforms (little / big endian). What is the probability of a hash collision? Arguments. Fletcher, Adler, CRC), non-cryptographic hashes (e.g. xxHash - Extremely fast hash algorithm. function (Databricks SQL) October 14, 2021. MD5 is often used as a checksum to verify data integrity. I ran benchmarks and tests in the kernel and tests in userland. This question is just a general form of the birthday problem from mathematics. Crc32 Vs Returns a 64-bit hash value of the arguments. djb2a The Get-FileHash cmdlet computes the hash value for a file by using a specified hash algorithm. CRC32 0.43 GB/s 9 MD5-32 0.33 GB/s 10 Ronald L.Rivest SHA1-32 0.28 GB/s 10 As of Feb 2017 there was no official documentation other than the source code to explain xxHash QuickHash GUI User Manual (c) Ted Smith 2011 - 2017 Page 5 of 27 In this article: Syntax. 1.7. crc32: Calculates the cyclic redundancy check value (CRC32) of a binary column and returns the value as a bigint.. hash: Calculates the hash code of given columns, and returns the result as an int column.. xxhash64: Calculates the hash code of given columns using the 64-bit variant of the xxHash algorithm, and returns the result as a long column. It successfully completes the SMHasher test suite which evaluates collision, dispersion and randomness qualities of hash functions. I have made my little ZPAQ patch with two "checksum": crc32c (via hardware SSE 4.2) and sha1. ... smhasher vs xxHash. I extracted it out from zstd since it is useful on its own. The CRC32 found in zip and a lot of other places uses the polynomial 0x04C11DB7; its reversed form 0xEDB88320 is perhaps better known, being often found in little-endian implementations. About Crc32 Murmur Vs Hash . Crc32 Moreover, CRC32C produces 32 bits, XXH3 produces 64 bits, CRC32C features several weaknesses for a good hash (huge bias, larger collision rate), while XXH3 features none (at least none measured by SMHasher). Is wyhash a good hash? crc32: Calculates the cyclic redundancy check value (CRC32) of a binary column and returns the value as a bigint.. hash: Calculates the hash code of given columns, and returns the result as an int column.. xxhash64: Calculates the hash code of given columns using the 64-bit variant of the xxHash algorithm, and returns the result as a long column. smhasher vs xxHash - compare differences and reviews ... XxHash, by Yann Collet is ... Vo CRC32 0.43 GB/s 9 MD5-32 0.33 GB/s 10 Ronald L.Rivest SHA1-32 0.28 GB/s 10 To the knowledge of the author there is currently no official documentation other than the source code to explain xxHash and its ways of working. Stay tuned for another post tomorrow. A tool such as smHash can thus benchmark each of the methods, and, using a Linux Mint … The packages contains the same as the standard library, so you can use the godoc for that: gzip, … smhasher VS xxHash Compare smhasher vs xxHash and see what are their differences. xxHash, MurmurHash, CityHash) and cryptographic hashes (e.g. For example 0 is the minimum, 0.5 is the median, 1 is the maximum. MD5; MD5 is an older type of hashing, which encodes information into a 128-bit fingerprint and is usually used to verify data integrity (as a checksum). Code is highly portable, and hashes are identical on all platforms (little / big endian). Adler-32 is often mistaken for a … 160 bits or over). ~34s vs ~17s for my testbed. The results are different, naturally. **crc7** Use a crc7 sum of the data area and store it in the header of each: block. ⦁ Per-block hashes are Blake2b, xxHash and spooky hash. SHA-1 produces a message digest based on principles similar to those used by Ronald L. Rivest of MIT in the design of the MD2, MD4 and MD5 message digest algorithms, but generates a larger hash value (160 bits vs. 128 bits).. SHA-1 was developed as part of the U.S. Government's Capstone project. This is where many of wondered why we didn’t just move from SHA-1 to SHA-3. xxHash is an Extremely fast Hash algorithm, running at RAM speed limits. In Linux there is `base64 file_path`. ⦁ Per-block hashes are MD5 and a variation of CRC32. This is a list of hash functions, including cyclic redundancy checks, checksum functions, and cryptographic hash functions. Linear probing hash tables needs a good hash function, but in my experience … It's hard to make a choice: obviously SHA1 is much "stronger" from every point of view. MD5, SHA1, SHA3)? A hash function maps some data to other data. approx. Home / encryption / This tool support 64 / 65 bit only, if you want 32 / 33 bit, you can go to Cyclic Redundancy Check 32 bit (CRC-32) About It's designed to be fast on 64-bit processors. However, MurmurHash and XXHash ’ bad performance again raises red flag that they should be avoided to be used. The checksum is not safe to protect against malicious changes: it is pretty easy to create a file with a particular checksum. There are many different types of hash algorithms such as RipeMD, Tiger, xxhash and more, but the most common type of hashing used for file integrity checks are MD5, SHA-2 and CRC32. Xbox One (AMD Jaguar 1.75GHz CPU) results, compiled Visual Studio 2015 in Release mode: Similar to iPhone results, xxHash is quite a bit slower than CityHash and FarmHash. I just found this when implementing a counting bloom filter in Lua. Supported algorithms: CRC32, MD5, SHA-1, SHA-256, SHA-512, Panama, Tiger, RipeMD, Whirlpool and xxHash. Generate CRC-64 Hash / Checksum from your text or file. ... xxHash. Murmur2, Meiyan, SBox, and CRC32 provide good performance for all kinds of keys. ca/ Tools to decode / decrypt / reverse lookup SHA1 hashes. MD5 is often used as a checksum to verify data integrity. A new release, now at version 0.6.12, of the digest package is now on CRAN and in Debian.. Adler32 vs CRC32 for Asset ID General and Gameplay Programming Programming. I have used it with linear probing hash tables with good results. ... but 0.28 Gb\s vs 5.4Gb\s….that alone has to be worth some serious investment of research. If you feed this function the two strings “plumless” and “buckeroo”, it generates the same value. The crc32 instruction version (which computes a CRC-32C) took 24 ms of CPU time. xxHash uses 64 bit multiplications heavily, whereas others mostly do shifts and logic ops. xxhash64 function (Databricks SQL) xxhash64. If one byte changes, the checksum changes. “CRC” stands for “cyclical reduction check.” It’s a kind of code used to discover errors or changes in a data set. There are many different types of hash algorithms such as RipeMD, Tiger, xxhash and more, but the most common type of hashing used for file integrity checks are MD5, SHA-2 and CRC32. xxHash - Extremely fast hash algorithm. Les blocs peuvent avoir une taille de 1 Ko à 1 Go. I used three different key sets: A list of 216,553 English words archive (in lowercase); The numbers "1" to "216553" (think ZIP codes, and how a poor hash took down msn.com archive); 216,553 "random" (i.e. I doubt that there are similar guarantees for … xxHash is an Extremely fast Hash algorithm, running at RAM speed limits. Extremely fast non-cryptographic hash algorithm (by Cyan4973) #Xxhash #Smhasher #hash-functions #C #Dispersion #Hash #hash-checksum. Seems like CRC32C has 40%+ more collisions than CRC32B which is significant, comparing that other hashes, including cryptographic, have around 45 like CRC32B. If you're hashing large quantities of data, and need good performance xxHash is a good option. It successfully completes the SMHasher test suite which evaluates collision, dispersion and randomness qualities of hash functions. xxhash is really fast, much … Hashes vs Checksums. QuickHash GUI is an open-source data hashing tool for Linux, Windows, and Apple Mac OSX with graphical user interface (GUI). I benchmarked xxhash as a special character device. As far as I am aware, the main reason has to do with collisions. xxHash is using llvm::xxHash(). It successfully completes the SMHasher test suite which evaluates collision, dispersion and randomness qualities of hash functions. I tried different hashes such as Murmur3 finalizer, rrmxmx and splitmix64, but CRC32 seems to provide the better speed vs collision trade-off. SHA-256 is the successor of the SHA-1 hash function. About Hash Murmur Vs Crc32 . crc7 Use a crc7 sum of the data area and store it in the header of each block. The Secure Hash Algorithm version 3 fixes flaws in the now-standard SHA-2 cipher. XXH3 (and XXhash too) is not designed to mince short sets of bytes but rather looong. MD5 (Message Digest 5): The 2022.1 beta is now available for testing. There are some great hash checker programs and online tools using which you can easily check the MD5 checksum or hash of a file. CRC32(): You want to read data from a source across a wide area network. None. The default is to use CRC32, but MD5 and SHA1 also work, and you can use your own function, such as a compiled UDF, if you wish. How higher? That's not to say it's a more suitable hash algorithm, but I wasted considerable time considering a vectorized xxhash vs crc32 for checksum purposes, before I realized I couldn't come close to crc32 in performance. The most up-to-date variation, XXH3, performs exceptionally well with small data. Feature Request: (OPTIONAL) Background Hashing. approx. *PATCH v4 0/8] Add support for ZSTD-compressed kernel and initramfs @ 2020-04-01 5:39 Nick Terrell 2020-04-01 5:39 ` [PATCH v4 1/8] lib: prepare zstd for preboot environment Nick Terrell ` (9 more replies) 0 siblings, 10 replies; 17+ messages in thread From: Nick Terrell @ 2020-04-01 5:39 UTC (permalink / raw) To: Nick Terrell Cc: linux-kernel, Chris Mason, linux-kbuild, x86, … To find out what's new, have a look at our 2022.1 beta blog post. It successfully completes the SMHasher test suite which evaluates collision, dispersion and randomness qualities of hash functions. All other hash functions and the CRC checksum perform equally well with random data. Details. **crc16** Use a crc16 sum of the data area and store it in the header of each: block. If you feed this function the two strings “plumless” and “buckeroo”, it generates the same value. Parameters: col – str, list. The receiver divides the message (including the calculated CRC), by the same polynomial the trans-mitter used. SipHash. What are the differences between checksums (e.g. crc32 Use a crc32 sum of the data area and store it in the header of each block. CityHash64 took 55 ms, CityHash128 60 ms, and CityHashCrc128 50 ms. This variant of CRC-32 uses LSB-first order, sets the initial CRC to FFFFFFFF 16, and complements the final CRC. The initial candidate for this role was CRC32, but it turned out being several times slower than LZ4 decompression, ... xxHash was created mostly as a checksum companion, digesting long inputs. It pretty much seal the deal. What MarshalZ4 can do: 1 Million = 1000000 iterat(s) for each 1 Round - Dictionary: 4.12160801888 (s) 2 Round - List 1.68728590012 (s) 3 Round - Int Flawless 0.133377075195 (s) However this creates about 0.0001% hash collisions, which would not … Encryption for use in your codes. The original specification of the algorithm was published in 1993 under the … Name Length ... xxHash: 32, 64, 128 bits product/rotation t1ha (Fast Positive Hash) 64 and 128 bits product/rotation/XOR/add pHash: fixed or variable see Perceptual hashing: Two observations: 1.) WyHash is definitely better with short strings. *PATCH v2 0/4] Support xxhash64 checksums @ 2019-08-22 11:40 Johannes Thumshirn 2019-08-22 11:40 ` [PATCH v2 1/4] btrfs: turn checksum type define into a enum Johannes Thumshirn ` (4 more replies) 0 siblings, 5 replies; 15+ messages in thread From: Johannes Thumshirn @ 2019-08-22 11:40 UTC (permalink / raw) To: David Sterba; +Cc: Linux BTRFS Mailinglist, Johannes … Hashes supported include MD5, SHA-1, SHA-256, SHA-384, SHA-512 and CRC32. crc16 Use a crc16 sum of the data area and store it in the header of each block. Real life vs max checksum speed. LuaJIT is fully compatible with Lua 5.1 , and includes many features from Lua 5.2 as well as some portability enhancements of the standard library. They can be recommended as general-purpose hashing functions on x86. xxhash Use xxhash as the checksum function. This question is just a general form of the birthday problem from mathematics. Murmur, a couple variants of it. Dec 3: The search for a faster CRC32. 3 December 2015 / Rob N ★. You would normally use a cryptographic hash to achieve this; you definitely need a large output size of the hash (i.e. approx. Answer (1 of 3): A CRC is a hash, it's just not a secure one. ↓ 16 – Copy Handler | Windows Copy Handler program is a small tool designed for copy/move files and folders between different storage media. It is often used to speed up comparisons or create a hash table. I learned to appreciate the value of the Cyclic Redundancy Check (CRC) algorithm in my 8-bit, 300 baud file transferring days. sha512 It was created by Austin Appleby in 2008 and is currently hosted on GitHub along with its test suite named. With the help of zlib.crc32() method, we can compute the checksum for crc32 (Cyclic Redundancy Check) to a particular data. See Description. Both are used to ensure the integrity of a file via an alphanumeric string. 2. For small quantities of data, something simple like FNV should be good enough. Source Code. There are hash functions that are as fast or faster than FNV and stastically stronger (and faster) than xxhash. A checksum (such as CRC32) is to prevent accidental changes. ⦁ Per-file hash is SHA1. txt) or read book online for free. Totaly a 10 char "hex" hash will have 40bits of entropy while a … LRC (Longitudinal Redundancy CRC (Cyclical Redundancy. CRC32 Slicing-by-16. Hardware-accelerated CRC (labeled iSCSI CRC in the table) is the fastest hash function on the recent Core i5/i7 processors. This is known as a hash collision. Features. Originally designed for Linux, but is … Can be a single column name, or a list of names for multiple columns. Why aren't we using SHA-3? MD5 is 7.6% slower than SHA-1 for short strings and 1.3% for longer strings. Hash function quality and speed tests (by rurban) #hash-functions #C++ #Test. About Hash Crc32 Vs Murmur . Do not put xxhash in any position where cryptographic hash functions are required. The hash comes from the same author as xxhash. Not a candidate. Leprechaun: In this revision, 1 pass is to be executed. CRC32. DONT USE XXHASH IN HMAC. The processor was otherwise idle, and was running at 5 GHz. As you can see - 32 bit hashes are prone to collisions, and good hashes have similar chance of collision in set of this size equal to ~45. CRC32 works best on large data blocks because short sequences might lead to an increased number of collisions. Yes. 00463 with a marketcap of $24,120. For example in php one writes base64_encode(file_get_contents(“x.png”)); xxHash. CRC32, FNV and djb2, as I found them in our own codebase. I did not actually check whether they are proper implementations or somehow tweaked! It successfully completes the SMHasher test suite which evaluates collision, dispersion and randomness qualities of hash functions. SpookyHash V2, the 128 bit variant, only taking 64 lowest bits. LuaJIT is a tracing just-in-time compiler (JIT) for Lua, and it's one of the fastest compilers for a dynamic language around. Create hashes of your files or text strings. By convention the output value for a CRC is called a "checksum", and the output value for a hash function is called a "digest". This works out to 32 bytes of hashes per 64KB of raw data, plus 512 bytes of a fixed header - about 0.05% of the data size. You can also perform the same operation for SHA1, SHA256, SHA384, SHA512 and CRC32 hashes, and also convert to and from URL encoded strings, Base64 and Base85 ( aka ascii85). MD5 - An MD5 hash function encodes a string of information and encodes it into a 128-bit fingerprint. Optimized deflate packages which can be used as a dropin replacement for gzip, zip and zlib. SipHash. CRCs are a type of error-detecting code used to implement checksums. Not a candidate. There are multiple hash function families that should be used before either of the above in modern applications unless you need backward compatibility (like the CRC case in the article). The world was being forced from SHA-1 with most of the work effort for the migration coming in … Which crc32 implementation are you using? CRC32 would certainly not be fine. probabilities – a list of quantile probabilities Each number must belong to [0, 1]. Code is highly portable, and hashes are identical on all platforms (little / big endian). This is the third post in the FastMail 2015 Advent Calendar. CRC32; The cyclic redundancy check is typically used to check for file integrity in FTP servers and Zip files. With base16 you get 4 bits of information per character, with base64 this figure is 6bits/char. BCrypt. This is known as a hash collision. xxHash is an Extremely fast Hash algorithm, running at RAM speed limits. Well, I know CRC-32 is fast these days but it still isn't that fast. MD5 - An MD5 hash function encodes a string of information and encodes it into a 128-bit fingerprint. The digest creates hash digests of arbitrary R objects (using the ‘md5’, ‘sha-1’, ‘sha-256’, ‘crc32’, ‘xxhash’ and ‘murmurhash’ algorithms) permitting easy comparison of R language objects.. crc is a naive implementation with two concatenated crc32 values, using the SSE4.2 intrinsic _mm_crc32_u32 - thus using only two instructions per 4 bytes. Je constate que l’utilisation de touches Ssortingng dans HashMap-s est très répandue (en utilisant la méthode hashCode par défaut de Ssortingng). SpookyHash wins at larger data sizes. Rather than identifying the contents of a file by its file name, extension, or other designation, a hash assigns a unique value to the contents of a file. Implementation of a function ‘digest()’ for the creation of hash digests of arbitrary R objects (using the ‘md5’, ‘sha-1’, ‘sha-256’, ‘crc32’, ‘xxhash’ and ‘murmurhash’ algorithms) permitting easy comparison of R language objects, as well as a function ‘hmac()’ to create hash-based message authentication code. Fast forward nowadays, and xxHash is being used in more places than it was originally expected. Similar to crc32 and among the contenders only because it was easy to evaluate but otherwise is not in the final round. Code is highly portable, and hashes are identical on all platforms (little / big endian). Take the well-known hash function CRC32, for example. CRC-32: 32 bits CRC: CRC-32 MPEG-2: 32 bits CRC: CRC-64: 64 bits CRC: Adler-32 is often mistaken for a CRC, but it is not, it is a checksum. Q3: Are the values generated by CRC32 and MD5 unique? 5 and shows: I tried to manually install. 3.2 GByte/s. 02 microseconds sha256 (hex) 15. The hash comes from the same author as xxhash. **crc32** Use a crc32 sum of the data area and store it in the header of each: block. There are many different types of hash algorithms such as RipeMD, Tiger, xxhash and more, but the most common type of hashing used for file integrity checks are MD5, SHA-2 and CRC32. MarshalZ4-Python is an implementation of pure python Marshal.In facts, MarshalZ4 is an extremely fast data dump. All-Projects Rights inherited by all other projects All-Users Individual user settings and preferences. Returns. 0. What makes a hash function cryptographically secure is that it's difficult to determine the input if … xxHash is a non-cryptographic hash function known for its exceptional speed, working at RAM speed limits. There are a number of hash checksum algorithm formats including MD5, SHA1, SHA256, SHA384, SHA512, SFV, CRC, Base64, LM, etc. Similar to crc32 and among the contenders only because it was easy to evaluate but otherwise is not in the final round. Murmur3F outperforms Java’s CRC32 by factor 4 and Guava’s implementation of the same hash by factor 10. A checksum (such as CRC32) is to prevent accidental changes. These include xxHash, Mumur, Spooky, City Hash and FNV. In fact smhasher implements both, the slow soft crc32 he cites, and the fastest crc32_pclmul, which is not just 47x faster, but 5000x faster. That's good, but that's still less than XXH3, which clocks at > 40 GB/s. A hash function maps some data to other data. 813 * When this macro is enabled, xxHash actively checks the input for a null pointer. A hash is simply any function that maps one set of values to another, where the second set is smaller. However, a CRC *guarantees* detection of *all* single-bit errors. Hash length is 48 hexadecimal digits. Generally the fastest software checksum that fio supports. 814 * If it is, the result for null input pointers is the same as a zero-length input. About Hash Murmur Crc32 Vs . SIMD implementations can be around 14x faster than the crc32 implementation in zlib (the C library). Download kernel-core-5.14.0-26.el9.x86_64.rpm for CentOS 9 Stream from CentOS BaseOS repository. What is the probability of a hash collision? 3 Fast and Secure permutation based ciphers (seekable/with random access), AES. The checksum is not safe to protect against malicious changes: it is pretty easy to create a file with a particular checksum. It’s an error-detecting code that looks for accidental data changes. Hash is a digital signature-based encryption system to check the integrity of a file. As disclosed in a recent study , the collision rate of CRC32 (and CRC32C) for typical storage workloads is lower than 8 X 1 0 − 5, and for xxh64 (64-bit version of xxhash) 4 billion hashes have a 50% chance of getting one collision . I ran in four modes, no-op, xxh32, xxh64, and crc32. CRC64. Adler32 is outdated (and wasn’t designed as a hash). A hash value is a unique value that corresponds to the content of the file. Your chart shows that the xxh family has much greater (10x or more) throughput than crc32. There are many different types of hash algorithms such as RipeMD, Tiger, xxhash and more, but the most common type of hashing used for file integrity checks are MD5, SHA-2 and CRC32. JavaScript In particular, CityHash appears to be very nearly as fast as a CRC-32 calculated using the Intel crc32 hardware instruction! If, instead of XXH3+CRC32 you use XXHash128+XXHash32 that could be better. If you have a 10 characters hash you get higher entropy if it is encoded with base64 vs base16 (or hex). SHA256 **xxhash** Use xxhash as the checksum function. This hash is made for hash tables and hashing short strings but we want 4KiB or larger blocks. The CRC algorithm should then be iterated over all of the data bytes, as well as the bits within those bytes. Here's how to prepare for a migration to SHA-3 when SHA-2 is inevitably compromised. xxHash is an Extremely fast Hash algorithm, running at RAM speed limits. SHA-256 is 15.5% slower than SHA-1 for short strings and 23.4% for longer strings. Leprechaun: In this revision 128MB 10-way hash is used which results in 10 x 16,777,216 internal B-Trees of order 3. probably use a truncated cryptographic hash in place of a CRC-32 and be safer than if you tried to use a CRC-32 to protect against a determined adversary. In "real life" (checking mixed load of small files) it is about two time slower than crc32c (on my PC). The Cyclic Redundancy Check (CRC) family of hashes are, compared to MurmurHash, very simple to implement. Details. This trick was found to be broken with 5. ; You may also be interested in pgzip, which is a drop in replacement for gzip, which support multithreaded compression on big files and the optimized crc32 package used by these packages.. I tested some different algorithms, measuring speed and number of collisions. It successfully completes the SMHasher test suite which evaluates collision, dispersion and randomness qualities of hash functions. If one byte changes, the checksum changes. 004658551 Kollisionen vergleichen - FAILED 5857387 9927517 69328 0. require xxhash. There are many different types of hash algorithms such as RipeMD, Tiger, xxhash and more, but the most common type of hashing used for file integrity checks are MD5, SHA-2 and CRC32. 1.7. xxHash32 (my code) 5.9 GByte/s. Release 78 and older: ⦁ Default block size is 32KB. Answer: You can hash its content, yes. It will give 32-bit integer value as a result by using zlib.crc32() method.. Syntax : zlib.crc32(s) Return : Return the unsigned 32-bit checksum integer. The purpose of the hashes or hash codes and checksums is the same. CRC32C uses a different polynomial (0x1EDC6F41, reversed 0x82F63B78) but otherwise the computation is the same. The FNV hash created by Fowler, Noll and Vo (see their website ) comes with zero memory overhead (no precomputed look-up tables), is an incremental (rolling) hash and has a good avalanche behavior. The text was updated successfully, but these errors were encountered: MD5 – An MD5 hash function encodes a string of information and encodes it into a 128-bit fingerprint. I copied the code from the upstream XXHash source repository and translated it into kernel style. If the uploader of a file has provided that hash for the uploaded file, you can verify it easily. It has shown to be slow in the microbenchmark. xxHash is an Extremely fast Hash algorithm, running at RAM speed limits. These parameterize the CRC-32 algorithm, and are sometimes known as crc32 and crc32c. Take the well-known hash function CRC32, for example.