glGenQueries, glBeginQuery, glEndQuery, glDeleteQueries, glGetQueryObject, glGetQueryiv, glGet
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glQueryCounter: man3/glQueryCounter.xml
glQueryCounter causes the GL to record the current time into the query object named id. target must be GL_TIMESTAMP. The time is recorded after all previous commands on the GL client and server state and the framebuffer have been fully realized. When the time is recorded, the query result for that object is marked available. glQueryCounter timer queries can be used within a glBeginQuery / glEndQuery block where the target is GL_TIME_ELAPSED and it does not affect the result of that query object.
glQueryCounter is available only if the GL version is 3.3 or higher.