Is there a performance or storage space advantage to lowering time/timestamp precision in PostgreSQL?

PostgreSQL allows time/timestamp to specify a precision:

time, timestamp, and interval accept an optional precision value p which specifies the number of fractional digits retained in the seconds field. By default, there is no explicit bound on precision. The allowed range of p is from 0 to 6.

From PostgreSQL 13 Documentation

However it states that storage space is a constant 8-bytes for (timestamp and time without timezone) and 12-bytes for time with timezone regardless of p.

In the case that one doesn’t need extra precision — say milliseconds(p = 3) or seconds(p=0) would suffice — is there an advantage to explicitly lowering the precision?

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When building while defining a shader storage buffer like below, Visual Studio gives me the error "too few arguments for call" and multiple undeclared identifier and syntax errors on the line with glBufferData. I am using the newest version of GLEW, c++17, Visual Studio 2019 and my graphics card supports OpenGL 4.6. The same thing happens with glNamedBufferData other opengl functions work perfectly.

vector<int> data;  GLuint ssbo; glGenBuffers(1, &ssbo); glBindBuffer(GL_SHADER_STORAGE_BUFFER, ssbo); glBufferData(GL_SHADER_STORAGE_BUFFER, data.size() * sizeof(int), &data[0]​, GL_DYNAMIC_DRAW);  glBindBufferBase(GL_SHADER_STORAGE_BUFFER, 3, ssbo); glBindBuffer(GL_SHADER_STORAGE_BUFFER, 0); // unbind 

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I installed a Percona XtraDB cluster with pxc_strict_mode set to ENFORCING, and am trying to import databases from non-Galera MariaDB servers. This works fine for some databases, by dumping them via mysqldump --skip-locks -K and importing them via mysql <database> < <dumpfile> (after creating a blank database using CREATE DATABASE). One database however is refused the import:

ERROR 1105 (HY000) at line 40: Percona-XtraDB-Cluster prohibits use of ALTER command on a table (example.example) that resides in non-transactional storage engine (except switching to transactional engine) with pxc_strict_mode = ENFORCING or MASTER 

Most internet threads simply suggest temporarily disabling pxc_strict_mode. Given however that other databases import without any issues, I assume the issue should be resolvable by altering either the the flags appended to mysqldump, or modifying the statements inside the dumpfile. I attempted removing all ALTER statements in the dump, which changes the above error to ...prohibits the use of DML command....

Both, the source MariaDB instance, as well as the new XtraDB Cluster, are configured with the default InnoDB storage engine.

Would appreciate any input.

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